Local planting guide · Great Plains
zip 77053
Houston is in USDA hardiness zone 9b, with average winter lows of 25°F to 30°F. The local growing season runs roughly 01/30 through 12/28 (~330 days). This zip falls within the Great Plains growing region.
- USDA zone
- 9b 25°F to 30°F
- Last spring frost
- 01/30
- First fall frost
- 12/28
- Growing season
- 330 days
- Compatible crops
- 37
- Growing region
- Great Plains
Right now in Houston
Week 18 priorities
On the docket: transplant out after last frost · direct sow after last frost. See the full calendar →
Gardening in Houston
Houston's 330-day growing season (last frost January 30, first frost December 28) is one of the longest in the continental US, creating conditions unlike most of zone 9b. Winter cold is rarely the limiting factor. Instead, heat and humidity dominate the gardening calendar. The minimum winter temperatures of 25–30°F are mild enough that frost-tender crops like tomatoes, peppers, and sweet potatoes can grow for the majority of the year. Figs, Asian persimmons, pomegranates, and jujubes reach peak productivity in Houston's climate. The trade-off is relentless summer heat (regularly exceeding 90°F from June through September) and high humidity that breed fungal disease pressure. Gardeners further north in zone 9b struggle with winter freeze damage; Houston gardeners manage heat stress and disease resilience. Understanding this seasonal inversion is key to crop selection and calendar planning.
Regional context · Great Plains
What the Great Plains brings to Houston
Continental, windy, with severe heat and cold extremes. Cold-hardy fruit and small grains north; long warm season for melons, peppers, and pecans south.
Common challenges
Issues that most often defeat home gardeners in zone 9b, drawn from the broader USDA zone profile.
- ▸ Heat stress in summer
- ▸ Insufficient chill for most apples
- ▸ Salt spray near coasts
What defeats new gardeners in Houston
Fungal disease pressure peaks during the spring and fall shoulder seasons when moderate temperatures and high humidity create ideal conditions for powdery mildew, rust, and leaf-spot diseases. Many warm-season crops that thrive in zone 9b's drier regions suffer in Houston's moisture-laden air. Summer heat above 95°F can cause pepper and eggplant flowers to drop before fruit sets, severely reducing yield even when soil moisture is adequate. Soil alkalinity is common in the Houston area, inducing nutrient deficiencies in acid-loving plants and requiring sulfur amendment or container cultivation. Late-season disease pressure extends through November and December due to the absence of hard freezes, making disease management critical through the winter months.
Crops that grow in Houston
37 crops from our catalog match zone 9b, grouped by type.
Tree fruit
11 crops
zone 9b Fig
Ficus carica
zones 7a–10b
zone 9b Asian Persimmon
Diospyros kaki
zones 7a–10a
zone 9b Pomegranate
Punica granatum
zones 7b–10a
zone 9b Jujube
Ziziphus jujuba
zones 6a–9b
zone 9b Lemon
Citrus limon
zones 9a–11b
zone 9b Orange
Citrus sinensis
zones 9a–11b
zone 9b Lime
Citrus aurantiifolia
zones 9b–11b
zone 9b Grapefruit
Citrus paradisi
zones 9a–11b
Berries
2 crops
Vegetables
18 crops
zone 9b Tomato
Solanum lycopersicum
zones 3a–10b
zone 9b Sweet Pepper
Capsicum annuum
zones 4a–10b
zone 9b Hot Pepper
Capsicum species
zones 4a–10b
zone 9b Eggplant
Solanum melongena
zones 5a–10b
zone 9b Cabbage
Brassica oleracea var. capitata
zones 3a–9b
zone 9b Kale
Brassica oleracea var. acephala
zones 3a–9b
zone 9b Collards
Brassica oleracea var. acephala
zones 4a–9b
zone 9b Cucumber
Cucumis sativus
zones 3b–10a
Herbs
6 crops
Plan the year
Planting calendar for Houston
Year-view of seed starting, transplanting, planting, pruning, fertilizing, harvest, and pest-watch windows tuned to Houston's local frost dates.
Week ? · loading
This week in Houston, TX (zone 9b)
Quiet week in Houston, TX (zone 9b). this week is a good time to step back and plan ahead.
Nothing critical on the calendar this week.
187 bars · 37 crops
Calendar logic combines NOAA frost normals with crop-specific timing data. Local microclimate and weather always overrules the calendar; use this as a starting point.
Top pests for zone 9b
Ranked by how many crops in your zone they affect. Click through for IPM controls and signs to watch for.
Multiple species (Aphididae)
Small soft-bodied sap-sucking insects that reproduce explosively in spring. Excrete honeydew that supports sooty mold and attracts ants. Transmit viral diseases.
Multiple species (Aleyrodidae)
Tiny white moth-like flying insects that feed on plant sap and excrete honeydew. Transmit numerous viral diseases including tomato yellow leaf curl virus.
Meloidogyne species
Microscopic soil-dwelling worm that forms galls on roots, reducing vigor and yield.
Tetranychus urticae
Tiny mite that feeds on leaf undersides, causing stippling and webbing during hot dry weather.
Multiple species (Chrysomelidae)
Tiny black or bronze jumping beetles that put hundreds of small holes in seedling leaves. Most damaging on direct-seeded brassicas and young eggplant.
Odocoileus species
Whitetail and mule deer browse can devastate orchards and gardens, particularly in winter when food is scarce. Antler rub on young trunks kills saplings outright.
Pseudococcidae spp.
Soft white waxy insects that cluster at leaf joints, fruit stems, and root crowns. Honeydew secretion supports sooty mold; root mealybugs cause decline that mimics drought.
Coccoidea spp.
Sap-sucking insects that attach to bark, leaves, and fruit, secreting honeydew that fuels sooty mold. Heavy infestations weaken trees and cause leaf yellowing.
Top diseases for zone 9b
Ranked by how many crops in your zone they affect. Click through for symptoms, controls, and resistant varieties.
Pseudoperonospora cubensis (cucurbits) and others
Water mold (oomycete, not a true fungus) that thrives in cool damp conditions. Spreads rapidly through cucurbit and brassica plantings on wind-borne spores.
Cucumber mosaic virus, Tobacco mosaic virus, and others
Family of plant viruses producing mottled yellow-and-green leaf patterns. Vectored primarily by aphids; some are seed-transmitted or spread by handling tools and tobacco products.
Pythium and Rhizoctonia species
Soil-borne complex of water molds and fungi that kill seedlings before or shortly after emergence. The single most common cause of seed-starting failures.
Fusarium oxysporum
Soil-borne fungal disease that plugs vascular tissue and kills affected plants. Persists in soil for many years; impossible to eliminate once established.
Sclerotium rolfsii
Soil-borne fungal disease most damaging in warm humid Southern conditions. White mycelial fans and small mustard-seed-sized sclerotia at the soil line are diagnostic.
Calcium deficiency physiological disorder
Not a true disease but a calcium-uptake disorder caused by inconsistent soil moisture during fruit development. The dominant cause of damaged first-fruit on home tomato plantings.
Capnodium spp.
Black fungal coating that grows on honeydew secreted by aphids, scale, mealybugs, and whiteflies. Doesn't infect plant tissue directly but blocks photosynthesis and disfigures fruit.
Tomato spotted wilt orthotospovirus (TSWV)
Virus vectored by thrips, particularly western flower thrips. Wide host range and growing global distribution. No cure once infected.
Companion planting suggestions
Beneficial pairings drawn from companion data, filtered to crops that grow in zone 9b.
- Fig + Rosemary
Rosemary tolerates the dry sites figs prefer and provides aromatic pest deterrence.
- Tomato + Basil
The classic Italian pairing. Basil's volatile oils are reported to repel hornworms and whiteflies, and the two crops share the same warm-season schedule and water needs. Plant basil between tomato cages.
- Sweet Pepper + Basil
Same warm-season culture, same watering schedule. Basil reportedly improves pepper flavor and repels aphids and thrips that are pepper's primary pests.
- Hot Pepper + Basil
Compatible heat-loving culture, similar water needs. Basil interplanted between hot pepper plants supports beneficial insects and reduces aphid pressure.
- Lettuce + Tomato
Lettuce planted at tomato's base benefits from afternoon shade as the tomato grows, extending the lettuce harvest into early summer. Different root depths avoid competition.
- Cabbage + Onion
Onion smell confuses cabbage moth. Both prefer similar moisture and fertility. The onion-cabbage interplanting is a Northern European tradition.
Soil types reference
Soil texture and pH decide what grows easily on your specific lot. Find the closest match below for crop recommendations and amendment guidance.
Practical tips for Houston
Exploit the long season with succession planting of warm-season crops. Plant tomato and pepper transplants in late January and early February, harvest through spring and early summer, then replant again in mid-July for a fall and early-winter harvest as cooler temperatures reduce heat stress. Mulch heavily (3–4 inches of wood chips or compost) to reduce soil temperature, conserve moisture, and suppress soil-borne fungal spores during the wet spring months. Choose disease-resistant and humidity-tolerant varieties; open-pollinated fig varieties like Celeste or LSU Purple handle Houston humidity better than cultivars prone to splitting or root rot.
Frequently asked questions
- What grows most reliably in Houston?
Figs, Asian persimmons, pomegranates, jujubes, okra, sweet potatoes, and certain pepper varieties thrive in the heat and long season. Tomatoes and sweet peppers are dependable with proper variety selection and succession planting.
- When should I plant tomatoes in Houston?
Plant transplants in late January or early February, before the January 30 average last frost date, for spring and early-summer harvest. Replant in mid-July for a second crop maturing in October and November when cooler weather reduces heat stress.
- What's the biggest gardening challenge in Houston?
Fungal disease from sustained humidity in spring and fall, combined with summer heat that can reduce flowering in peppers and eggplants. Late-season disease pressure extends through December due to the absence of hard freezes.
- How long is the growing season in Houston?
Houston's frost-free period spans 330 days, from January 30 to December 28. This is significantly longer than most of zone 9b, allowing almost year-round cultivation of warm-season crops with proper planning.
- Can I grow citrus in Houston?
Yes, but cold-hardy varieties and protected microclimates are essential. Minimum winter temperatures of 25–30°F will damage tender varieties. Satsuma mandarins and hardy lemons are safer choices.
- Why do my peppers drop flowers in summer?
Pepper flowers drop when temperatures exceed 90–95°F consistently, especially combined with dry soil. Mulch heavily, water consistently, and plant a second crop in midsummer to mature during cooler fall months.
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Frost data: NOAA Climate Normals 1991-2020, station USW00012918. Local microclimates can shift these dates by a week or more.
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