Hill Country Native Plant & Vegetable Planting Calendar (Month-by-Month)

In Hill Country gardening, timing is one of the biggest factors in success, alongside plant selection, soil, sunlight, drainage, irrigation and pest pressure. A two-week shift can expose frost-tender tomatoes to a freeze or push cool-season crops toward damaging heat. The effect is crop-specific, however: heat-loving crops such as okra and Southern peas remain productive later than lettuce, English peas or tomatoes. This month-by-month planting calendar covers vegetables, native plants, ornamentals and wildflowers, with the frost dates, growing zones and soil realities that matter in Boerne, Fair Oaks Ranch, San Antonio and the surrounding counties.

Think of this as the companion piece to our Texas Hill Country Home Maintenance Calendar. That calendar covers what your property needs by season. This one covers what the soil needs, month by month, whether you are planting a vegetable garden, a native landscape, or a patch of bluebonnets that will light up next spring.

Why timing matters so much in the Hill Country

The Hill Country garden season is a study in extremes. Many lots have shallow, alkaline soil over limestone, but drainage varies: fractured limestone may drain rapidly, while dense caliche, clay or hardpan can impede downward water movement. Rainfall is erratic, with dry periods interrupted by intense storms and a prolonged summer stretch when gardens can bake for weeks. Temperatures can also swing sharply: a warm February can be followed by a March freeze, and extreme heat may arrive soon after the last spring rain.

All of that makes planting on schedule especially important. Get cool-season crops in by mid-February or early March and they beat the heat. Set out tomatoes before the last frost and you lose them to a freeze; wait a month and they stall in June heat before they ever set fruit. The plants are not fragile. The weather windows are what kill gardens, which is why this guide leads with the calendar while still recognizing that cultivar, soil and site conditions matter. Timing cannot overcome every problem: variety selection, sunlight, drainage, soil condition, irrigation and pest pressure still matter, but planting outside the appropriate weather window sharply reduces the odds of success.

The big picture: growing zones, frost dates and local microclimates

Before the month-by-month grid, understand the two governing numbers for your address: your USDA plant hardiness zone and your average frost dates. The hardiness zone tells you which perennials will survive your typical winter low. The frost dates tell you when it is safe to plant the things that will not survive a freeze [1][2].

The Boerne and Fair Oaks Ranch area straddles USDA plant hardiness zones 8b and 9a, while much of San Antonio is in zone 9a. Hardiness zones describe typical annual extreme minimum temperatures; they do not establish vegetable-planting dates. Local elevation, topography, urban heat, cold-air drainage and the property's individual microclimate can all affect the actual planting window [1][2].

Frost dates follow the same gradient. PlantMaps 19912020 climate normals put San Antonio's average last spring frost in the Feb. 2129 range, with the average first fall frost in the Nov. 2130 range. Boerne and Fair Oaks Ranch average a last spring frost in the Mar. 2131 range and a first fall frost in the Nov. 1120 range [3][4][5]. The practical result is a frost-free window of roughly 265 to 280 days in San Antonio proper and roughly 225 to 245 days in the Boerne and Fair Oaks Ranch area, depending on your exact elevation and exposure [3][4].

Texas A&M AgriLife Extension's Bexar County spring-planting table states that its published dates apply to the San Antonio area and that Hill Country spring planting should occur approximately 25 days later [7]. San Antonio dates are therefore an early reference point rather than direct planting dates for every Boerne or Fair Oaks Ranch property.

The 25-day adjustment applies specifically to the spring vegetable dates in the cited Bexar County Extension table. It should not be applied automatically to fall vegetables, native trees and shrubs, wildflower seeding or frost-date calculations. Fall crops must instead be scheduled backward from the first expected freeze and by the Texas gardening region shown in the AgriLife fall guide [7][14].

The late freeze contingency plan

Every Hill Country gardener plans around the last average frost date, and this calendar is built that way. But an average is just an average. A late-March or early-April cold snap can still occur after an unusually warm stretch, and one hard freeze can damage or kill the warm-season transplants we set out a little early: tomatoes, peppers, squash, and the rest of the tender crew. That is not a reason to skip the early window. It is a reason to have a plan for the nights the forecast turns cold. Everyone on this limestone loses a round to a late freeze now and then. The three steps below keep that from becoming a lost garden.

Keeping properly sized frost cloth on hand provides practical protection during March and April cold snaps.

The three-step plan when a late freeze is forecast

A National Weather Service Freeze Warning is issued when temperatures are expected to remain below 32�F for an extended period; temperatures below 28�F for an extended period can kill most seasonal vegetation [15]. Do these three things before the sun drops, in this order:

Two practical notes. First, containers and raised beds freeze faster than in-ground beds, because their roots sit above the surrounding soil where the earth's stored heat matters most. Potted plants can be moved against the house wall, clustered together, or wrapped with an extra layer on freeze nights. Second, tomatoes and peppers are among the most frost-sensitive plants we grow here, and the safest habit is simply to keep a roll of row cover or a couple of frost cloths on hand through March and April, the weeks when a forecast can still surprise [21].

And if a freeze still takes a few plants in a bad year, you have plenty of company. The season here is long and forgiving, some warm-season crops can still be planted through May, although tomatoes and peppers planted that late may encounter heat-related fruit-set problems, and the calendar's later windows exist for years exactly like that. This plan just makes sure a bad night stays a small setback instead of a lost season.

Month-by-month planting calendar

The grid below is the heart of this article. Bookmark it, print it, tape it to the garden shed. Each row pairs what goes into the ground that month with the pruning, fertilizing, and bloom notes that matter at the same time. Vegetables follow the Texas A&M AgriLife Extension planting calendars for our region, adjusted for Hill Country timing [6][7][14]. Native and wildflower entries follow the Lady Bird Johnson Wildflower Center and Texas A&M Forest Service guidance [8][13][16][17].

The pattern worth internalizing is that Hill Country gardeners work with two main planting cycles: spring and fall. Cool-season crops occupy late winter into spring and return in fall. Warm-season crops fill late spring and summer, with only heat-tolerant crops thriving through the hottest portion of the year. With succession planting, appropriate varieties and occasional freeze protection, harvests can extend across much of the year.

Wildflower bloom windows: when the Hill Country colors up

Wildflower season is the reward for fall seeding. In the Hill Country, the main show runs from mid-March through early May, with the greatest variety and intensity in April. Bluebonnets and Indian paintbrush are the early signatures, typically peaking together from late March to mid-April, with bluebonnets lingering into early May in cooler, wetter years [11][12]. By May, Indian blanket, coreopsis, winecup, and pink evening primrose carry the color, and summer belongs to the perennials [12].

A good spring display begins with germination during the preceding fall, whether from newly sown seed or an established seed bank.

Because several signature species overlap from late March through April, late March through mid-April is also the prime window for wildflower tourism in the Hill Country. The timing lines up with the Hill Country Events, Festivals and Wildflower Season Calendar, and the best day trips of the season: Enchanted Rock and the other state natural areas on our Hill Country day trips pages sit in the middle of the bloom when rainfall has been cooperative. That is also the time of year when new residents realize that the roadside display develops from seedlings that germinated during the previous fall, often from long-established natural seed banks, not necessarily from seed planted by people each year.

The Lady Bird Johnson Wildflower Center recommends sowing Texas bluebonnets in October and November, with early October preferred. The seeds germinate in fall and grow as low rosettes through winter. Scarification can increase first-year germination, but it is not "essentially required." Untreated seed germinates gradually and creates a seed reserve for later years. The Wildflower Center specifically cautions against scarifying seed that will not receive supplemental water during dry winter and early-spring periods [16].

The deer reality factor

Deer pressure is a real, everyday fact of Hill Country gardening, and it deserves a straight answer. White-tailed deer are native here and plentiful across Kendall, Comal, and Bandera counties and the rest of the Hill Country, and Axis deer and other introduced exotic ungulates are established in the Texas Hill Country [26][27]. A deer can destroy a young native garden in a single night: new transplants, tender new growth, and fresh blooms are all on the menu, and a hungry doe does not read plant tags before she samples them. Physical exclusion remains the most reliable protection under heavy deer pressure. Deer-tolerant plant selection reduces damage where fencing is impractical, prohibited or undesirable, but it does not provide the same protection as an effective deer fence. Plant selection still matters, and the natives below are the plants repeatedly recommended by regional native-plant sources.

Reliable deer-tolerant native starters

These four establish well in our alkaline, limestone soil and tend to be left alone once mature. None is magic, but all four have earned their place in Hill Country gardens:

• Flame Acanthus (Anisacanthus quadrifidus var. wrightii): A heat-loving shrub with red, tubular blooms that hummingbirds work all summer. Generally browsed less readily than many tender ornamentals, but not immune under drought or heavy pressure [22].
• Mealy Blue Sage (Salvia farinacea): A tough, long-blooming native with blue flower spikes. Aromatic foliage is considered deer-resistant [23].
• Texas Betony, also called Scarlet Betony (Stachys coccinea): A low-growing perennial with red flowers that is at its best in shade or part shade. The Wildflower Center rates its deer resistance as high [24].
• Red Yucca (Hesperaloe parviflora): An evergreen with tall coral flower stalks. The foliage is deer-resistant, but deer may eat the flower stalks and blooms. Do not describe the entire plant as deer-proof [22][23][24][25].

Red yucca does well in the Hill Country, and its foliage rarely earns a second look from deer.

Be honest about the limits, too. No plant is reliably deer-proof when natural forage is scarce, and newly installed plants usually need more protection than established specimens. The pressure jumps in drought years, when natural browse runs short, and in the first season after planting, when young plants are the most tempting. Mature native plants generally need less protection than new transplants. For this calendar, treat October through February as the normal cool-season installation window for woody natives; use late September only after sustained heat has broken and irrigation is available [13]. Temporary fencing or repellent can protect new installations while roots establish, after which maintenance and supplemental watering often decrease.

One friendly heads-up before you invest in deer fencing: many Hill Country subdivisions restrict front-yard vegetable gardens, regulate fencing including deer fences and privacy screens, and require landscape-committee approval for xeriscaping or native-plant conversions. So before you install raised beds, deer fencing, or a full native conversion, check the HOA's landscape guidelines and any deed restrictions for the property. And if you are still shopping for a place, that is exactly the kind of thing to verify before you buy, which is what our HOA vs. no-HOA breakdown and acreage deed-restrictions guide walk through.

Soil prep and the caliche connection

Timing tells you when to plant; the individual site determines how to prepare the soil. Hill Country soils vary substantially from one property, and sometimes one part of a lot, to another. Some are shallow and fast-draining over fractured limestone, while clay, hardpan or a continuous caliche layer can impede downward drainage elsewhere. Do not assume that every lot has the same pH, drainage or soil depth. Calcareous soils are usually alkaline and may reduce the availability of nutrients such as iron, zinc and phosphorus, but a soil test is the only reliable way to determine the conditions in a particular bed [30][31].

If a private-well garden repeatedly develops salt crusting, leaf-tip burn or unexplained nutrient problems, test the irrigation water for pH, alkalinity, salinity and sodium rather than assuming the soil alone is responsible.

For vegetables and annual beds, imported soil in a properly drained raised bed is often the simplest answer. Compost can improve the structure and water-holding capacity of an in-ground vegetable bed. For native trees and shrubs, however, do not create a small, heavily amended planting pocket that can hold water above an impermeable layer. Correct drainage first, plant at the proper depth and follow species-specific guidance. The full treatment of what caliche is, how it forms, and how to garden around it lives in our caliche gardening guide.

Prepare each bed before its intended planting season. For a fall vegetable garden, remove the previous crop and prepare the soil before the fall planting dates in source [14]. Testing soil and building or refurbishing spring raised beds during fall can spread out the workload, but it is not a horticultural requirement. Apply nutrients and pH-altering amendments only according to a soil test and crop-specific recommendations [30][31].

And because the same limestone that shapes your garden also shapes your property, pair this calendar with the 12-month Hill Country home maintenance calendar. The freeze-preparation, irrigation, and drainage tasks in that calendar run on nearly the same schedule as the planting windows here, and doing both on the same seasonal clock keeps the whole property on one rhythm.

One hedge against summer drought and restricted irrigation is a rain barrel or larger rainwater collection system that captures winter and spring rainfall for later use. It pays off exactly when the calendar above matters most, and our drought and caliche rainwater guide and Hill Country rainwater harvesting overview cover the practical details.

Frequently asked questions

When is the last frost in Boerne or Fair Oaks Ranch?

In Boerne and Fair Oaks Ranch, the average last spring frost range is Mar. 2131, with the average first fall frost range Nov. 1120 [3][4]. San Antonio runs warmer: a Feb. 2129 last spring frost and a Nov. 2130 first fall frost. That yields roughly 265 to 280 frost-free days in San Antonio and about 225 to 245 days in Boerne and Fair Oaks Ranch, enough for two full cool-season cycles plus a warm-season garden. Treat the averages as planning ranges, not guarantees: check the National Weather Service forecast before setting out frost-tender plants, and keep row covers handy through early April in the Hill Country.

Can I plant tomatoes in March?

The Bexar County Extension spring table opens the San Antonio tomato-transplant window on March 15 [7]. Its stated 25-day Hill Country adjustment moves the opening date to approximately April 9 [7]. Later planting remains possible, but delaying too far into spring increases the likelihood that extreme heat will interfere with flowering and fruit set. A March tomato plant in Boerne is still a gamble against a real freeze risk, and no fixed date eliminates that risk. If you buy plants in March, hold them in pots until the freeze risk passes.

When do I plant bluebonnet seeds?

Plant Texas bluebonnet seeds in October or November; early October is preferred [16]. Scarification is optional. It can increase first-year germination, but scarified seed should receive supplemental water during dry winter and early-spring periods. Do not scarify seed when supplemental water will not be available, because untreated seed germinates gradually and preserves a seed reserve for later years [16]. Rhizobium inoculant is usually unnecessary in Texas soil [19].

Do I need to amend caliche soil?

Do not assume every Hill Country bed requires the same treatment. First determine the soil depth and whether water drains through or remains perched above clay, hardpan or a continuous caliche layer. Where native soil is too shallow, rocky or restrictive for vegetables, use a properly drained raised bed filled with suitable garden soil rather than trying to convert the caliche itself. Where workable soil exists above the restrictive layer, compost can improve structure and water-holding capacity. Use a soil test before applying fertilizer, sulfur, phosphorus or other nutrient amendments [30][31]. Do not assume that compost alone will correct an underlying drainage barrier. Our caliche gardening guide walks through the full method.

What grows best for a first-time Hill Country gardener?

Start with seasonally reliable crops and give vegetables improved soil rather than assuming they tolerate native alkalinity. Warm-season choices include okra, Southern peas, peppers and summer squash. Cool-season choices include leafy greens, radishes, carrots, broccoli and cabbage. Tomatoes can be productive in raised or amended beds when planted early enough to set fruit before extreme heat. For landscaping, specify actual native species, such as Texas lantana (Lantana urticoides), mealy blue sage (Salvia farinacea), autumn sage (Salvia greggii), esperanza (Tecoma stans) and red yucca (Hesperaloe parviflora), rather than using broad names such as 'lantana' or 'salvia' that include nonnative species.

Should I water new native plantings during a drought?

Yes, especially through the first growing season; woody trees and shrubs may require establishment watering for one to two years, depending on species, soil, rainfall and planting size. Native does not mean zero water; it means the plant is adapted to our climate once established. Newly planted natives need regular, deep watering through their establishment period, then deep, infrequent watering during dry spells beats frequent shallow watering, which is exactly the wrong pattern on shallow rocky soil. Mulch three to four inches around new plantings, keep it off the trunks, and water at the root zone rather than the foliage.

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Sources and additional reading

1. USDA Agricultural Research Service, Plant Hardiness Zone Map (2023 update). Official zone boundaries and temperature ranges by location. planthardiness.ars.usda.gov
2. PlantMaps, Hardiness Zones for ZIP 78006 (Boerne) and 78015 (Fair Oaks Ranch). Zone-by-ZIP detail for the Boerne and Fair Oaks Ranch area. plantmaps.com/78006 and plantmaps.com/78015
3. PlantMaps, Average Last Frost Dates Map for Texas (19912020 climate normals). Average last spring frost date ranges by location, including the Feb. 2129 San Antonio range and the Mar. 2131 Boerne and Fair Oaks Ranch range. plantmaps.com
4. PlantMaps, Average First Frost Dates Map for Texas (19912020 climate normals). Average first fall frost date ranges by location, including the Nov. 1120 Boerne and Fair Oaks Ranch range and the Nov. 2130 San Antonio range. plantmaps.com
5. The Old Farmer's Almanac, Planting Calendar for San Antonio, TX. San Antonio frost dates and planting windows. almanac.com
6. Texas A&M AgriLife Extension, Bexar County Master Gardeners, Vegetable Planting Calendar. Month-by-month vegetable planting calendar for the San Antonio area, including the guidance to plant about 25 days later in the Hill Country. bexarmg.org
7. Texas A&M AgriLife Extension, Bexar County, Recommended Vegetable Varieties for Spring Planting. Spring planting date ranges for tomatoes, peppers, beans, corn, and other warm-season crops. bexar-tx.tamu.edu
8. Lady Bird Johnson Wildflower Center, Recommended Native Plant Lists and Collections. Central Texas and Hill Country native plant selection for home gardens. wildflower.org/collections
9. Texas A&M Forest Service, Prevent the Spread of Oak Wilt in Texas (February 5, 2024). Avoid elective oak pruning or wounding from February through June, and immediately paint every fresh oak wound regardless of season. tfsweb.tamu.edu
10. Texas A&M AgriLife Extension (Aggie Horticulture), Planting and Harvesting Potatoes. Central Texas potato planting periods of February through March in spring and August through September in fall. aggie-horticulture.tamu.edu
11. Texas Monthly, Where (and When) to Get Your Eyes on Some Texas Wildflowers. Hill Country wildflower season timing and peak windows. texasmonthly.com
12. Lady Bird Johnson Wildflower Center, Texas Top 20 Wildflowers. Bloom windows and growing notes for bluebonnet, Indian paintbrush, winecup, evening primrose, Indian blanket, and coreopsis. wildflower.org/texas
13. Native Plant Society of Texas, Kerrville Chapter, Hill Country Resources. Official source page describing Native Plants for Landscaping in the Texas Hill Country, including common and deer-resistant plants for Kerrville and surrounding Hill Country areas. npsot.org Secondary PDF: NPSOT Hill Country brochure (PDF)
14. Texas A&M AgriLife Extension, Fall Vegetable Gardening Guide for Texas. Regional fall planting dates, frost-tolerant and frost-susceptible crop classifications, and last optimum planting dates. agrilifeextension.tamu.edu
15. National Weather Service, Understanding Cold Weather Alerts. Freeze Warning and extended 32�F and 28�F plant-damage thresholds. weather.gov
16. Lady Bird Johnson Wildflower Center, How to Grow Texas Bluebonnets. Fall seeding window, scarification, germination, and bloom timing for bluebonnets. wildflower.org
17. Texas A&M Forest Service, Wildflower Establishment. Fall seeding guidance for Texas wildflowers for spring bloom. tfsweb.tamu.edu
18. Oregon State University Extension, Grow Your Own Tomatoes and Tomatillos. Guidance requiring grafted tomato unions to remain above the soil. extension.oregonstate.edu
19. Lady Bird Johnson Wildflower Center, Ask Mr. Smarty Plants: Rhizobium Inoculant for Bluebonnets. When inoculant helps and when Texas soil already provides the right bacteria. wildflower.org
20. Bell County Master Gardeners, Monthly Gardening Checklist for Central Texas. Included as general regional background only; the Hill Country vegetable dates in this article follow sources [6], [7], [10] and [14]. txmg.org/bell
21. Texas A&M AgriLife Extension, Protecting Landscapes and Horticultural Crops from Frosts and Freezes (EHT-048). Freeze warning and hard freeze thresholds and cold-weather plant protection guidance from extension horticulturists. agrilifeextension.tamu.edu
22. Lady Bird Johnson Wildflower Center, Plant Database: Flame Acanthus (Anisacanthus quadrifidus var. wrightii). Native status, growth habit, and garden notes for flame acanthus. wildflower.org
23. Lady Bird Johnson Wildflower Center, Plant Database: Mealy Blue Sage (Salvia farinacea). Native status, growth habit, and garden notes for mealy blue sage. wildflower.org
24. Lady Bird Johnson Wildflower Center, Plant Database: Scarlet Betony (Stachys coccinea). Native status, growth habit, and garden notes for Texas betony. wildflower.org
25. Lady Bird Johnson Wildflower Center, Plant Database: Red Yucca (Hesperaloe parviflora). Native status, growth habit, and garden notes for red yucca. wildflower.org
26. Texas Parks and Wildlife Department, White-tailed Deer Research and Management. White-tailed deer range, habits, and management across Texas. tpwd.texas.gov
27. Texas Parks and Wildlife Department, White-tailed Deer vs. Exotics. Axis deer as an introduced exotic species established in the Texas Hill Country. tpwd.texas.gov
28. San Antonio Water System, Drought Restrictions & Watering Rules. Stage-based outdoor watering schedules, designated watering days, and permitted hours for SAWS customers. saws.org
29. City of Boerne (Boerne Utilities), Water Restrictions. Current drought stage and outdoor watering schedule for Boerne water customers. ci.boerne.tx.us
30. Texas A&M AgriLife Soil, Water and Forage Testing Laboratory. Research-based soil nutrient, pH, salinity and irrigation-water testing. soiltesting.tamu.edu
31. Texas A&M AgriLife Extension, Texas Home Vegetable Gardening Guide. Soil preparation, caliche and hardpan, crop selection, planting and fertilization. agrilifeextension.tamu.edu
32. Lady Bird Johnson Wildflower Center, Plant Database: Black-eyed Susan (Rudbeckia hirta). Species-specific bloom period of June through September. wildflower.org

Last verified: August 28, 2026