Local planting guide · California
zip 91385
Valencia is in USDA hardiness zone 10a, with average winter lows of 30°F to 35°F. The local growing season runs roughly 12/31 through 12/30 (~365 days). This zip falls within the California growing region.
- USDA zone
- 10a 30°F to 35°F
- Last spring frost
- 12/31
- First fall frost
- 12/30
- Growing season
- 365 days
- Compatible crops
- 28
- Growing region
- California
Right now in Valencia
Week 18 priorities
On the docket: transplant out after last frost · direct sow after last frost. See the full calendar →
Gardening in Valencia
Valencia sits in USDA zone 10a, where the last spring frost effectively never arrives (December 31) and the first fall frost is equally distant (December 30). This means a 365-day growing season, a condition shared by very few US gardening locations. The dominant trade-off is heat, not cold. Winter lows of 30-35°F are mild enough that freezes are rare and brief. The real constraint is summer intensity and water availability. Figs, Asian persimmons, pomegranates, and goji berries thrive here with minimal winter protection. Tomatoes, peppers, and eggplants can be succession-planted year-round instead of in a single spring window. However, that year-round potential is deceptive. Summer temperatures can exceed 100°F, soil dries quickly, and many varieties bred for temperate zones struggle with the intensity of zone 10a summer heat. The gardening calendar here is inverted from most of the country: spring and fall are the mild seasons where tender crops shine, while summer is the time to either seek shade, choose heat-tolerant varieties, or pause production.
Regional context · California
What the California brings to Valencia
From cool foggy coast to hot Central Valley to mountain to desert. Mediterranean climate dominates: wet winters, dry summers. The most productive agricultural state in the country, with reach into citrus and olives that exceed the rest of the country.
Common challenges
Issues that most often defeat home gardeners in zone 10a, drawn from the broader USDA zone profile.
- ▸ No chilling for traditional temperate fruit
- ▸ Hurricane exposure
- ▸ Heat-tolerant cultivars only
What defeats new gardeners in Valencia
Heat-induced blossom drop and fruit sunscald affect peppers, tomatoes, and stone fruits during peak summer (June through August). Eggplants are particularly prone to flower and fruit drop when nighttime temperatures remain above 75°F or daytime temperatures exceed 95°F. Water management is non-negotiable; Valencia's semi-arid climate and shallow summer rainfall mean supplemental irrigation is essential for nearly all fruit crops, especially during the hot months. Additionally, scale insects, spider mites, and whiteflies proliferate in the warm climate and can decimate fig foliage and pepper plants if not monitored. Many conventional pest-control windows that work in temperate zones are ineffective here due to year-round pest breeding cycles.
Crops that grow in Valencia
28 crops from our catalog match zone 10a, grouped by type.
Tree fruit
12 crops
zone 10a Fig
Ficus carica
zones 7a–10b
zone 10a Asian Persimmon
Diospyros kaki
zones 7a–10a
zone 10a Pomegranate
Punica granatum
zones 7b–10a
zone 10a Lemon
Citrus limon
zones 9a–11b
zone 10a Orange
Citrus sinensis
zones 9a–11b
zone 10a Lime
Citrus aurantiifolia
zones 9b–11b
zone 10a Grapefruit
Citrus paradisi
zones 9a–11b
zone 10a Avocado
Persea americana
zones 9b–11b
Berries
3 crops
Nuts
1 crop
Vegetables
10 crops
zone 10a Tomato
Solanum lycopersicum
zones 3a–10b
zone 10a Sweet Pepper
Capsicum annuum
zones 4a–10b
zone 10a Hot Pepper
Capsicum species
zones 4a–10b
zone 10a Eggplant
Solanum melongena
zones 5a–10b
zone 10a Cucumber
Cucumis sativus
zones 3b–10a
zone 10a Summer Squash
Cucurbita pepo
zones 3b–10a
zone 10a Melon
Cucumis melo
zones 5a–10a
zone 10a Watermelon
Citrullus lanatus
zones 5b–10a
Herbs
2 crops
Plan the year
Planting calendar for Valencia
Year-view of seed starting, transplanting, planting, pruning, fertilizing, harvest, and pest-watch windows tuned to Valencia's local frost dates.
Week ? · loading
This week in Valencia, CA (zone 10a)
Quiet week in Valencia, CA (zone 10a). this week is a good time to step back and plan ahead.
Nothing critical on the calendar this week.
147 bars · 28 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 10a
Ranked by how many crops in your zone they affect. Click through for IPM controls and signs to watch for.
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.
Meloidogyne species
Microscopic soil-dwelling worm that forms galls on roots, reducing vigor and yield.
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.
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.
Tetranychus urticae
Tiny mite that feeds on leaf undersides, causing stippling and webbing during hot dry weather.
Ceratitis capitata
Quarantine pest in many regions. Adult females puncture ripening fruit to lay eggs; larvae tunnel through the flesh, causing premature drop and rot.
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.
Top diseases for zone 10a
Ranked by how many crops in your zone they affect. Click through for symptoms, controls, and resistant varieties.
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.
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.
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.
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.
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.
Colletotrichum gloeosporioides
Most damaging mango disease worldwide. Fungal spores infect blossoms and developing fruit during humid weather, producing black sunken lesions that expand on ripening fruit.
Multiple species (Erysiphales)
Surface-feeding fungal disease producing white powdery growth on leaves and stems. Reduces yield by stealing photosynthate and accelerating senescence.
Companion planting suggestions
Beneficial pairings drawn from companion data, filtered to crops that grow in zone 10a.
- 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.
- Okra + Hot Pepper
Both heat-loving warm-season crops with similar water and fertility needs. Hot pepper at okra's base benefits from the slight afternoon shade in extreme summer heat.
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 Valencia
Heat-tolerant varieties are essential for Valencia summer production. 'Surefire' and 'Heatwave' tomatoes, Anaheim and New Mexico peppers, and heat-adapted eggplant cultivars retain fruit set when temperatures spike; standard varieties commonly drop flowers entirely when nighttime temperatures exceed 75°F or daytime heat exceeds 95°F. Shade cloth strategically deployed during June through August prevents sunscald and excessive leaf burn on sensitive crops while maintaining adequate light for photosynthesis; 30% shade cloth is typically sufficient in this climate. Mulch applied 3-4 inches deep moderates soil temperature and significantly reduces evaporation loss. Fall and early spring (September through March) are the optimal windows for establishing water-intensive crops like tomatoes, peppers, and eggplants. Planting during these cooler months allows young transplants to develop robust root systems before summer stress arrives, substantially improving overall productivity and harvest duration.
Frequently asked questions
- What's the best time to plant tomatoes and peppers in Valencia?
Unlike most of the US, Valencia can grow tomatoes and peppers twice per year. Plant in late August through September for a fall/early-winter crop (harvest November through January), and again in January through February for spring production (harvest April through June). Summer planting is possible but heat-induced blossom drop makes yields unreliable June through August.
- Can I grow figs and pomegranates year-round in Valencia?
Yes. Figs and pomegranates thrive in zone 10a and produce reliably without frost protection. Figs often bear twice per year: a spring crop (breba) on last season's wood and a summer crop on new growth. Pomegranates flower in spring and fruit in fall. Both prefer minimal summer water once established.
- What's the biggest weather risk in Valencia?
Not frost, but sustained heat and drought stress. Summer temperatures routinely exceed 95°F, and water availability is limited. These conditions can prevent fruit set, cause sunscald, and stress shallow-rooted crops. Irrigation planning and variety selection for heat tolerance are far more critical than frost protection.
- Do I need to worry about winter frost damage?
Rarely. Winter lows of 30-35°F in zone 10a are too mild for hard freezes. Established fig, pomegranate, and Asian persimmon trees survive unprotected. Young transplants and tender vegetables (eggplant, pepper starts) may experience light damage if temperatures dip to the low 30s, but sustained freezes are uncommon.
- What's the water situation in Valencia?
Valencia receives minimal rainfall, especially May through September. Supplemental irrigation is mandatory for all productive gardens. Drip irrigation is far more efficient than overhead watering in this semi-arid climate. Mulching heavily (3-4 inches) reduces evaporation and moderates soil temperature.
- Can I grow Asian persimmons here?
Absolutely. Asian persimmons are ideally suited to zone 10a. Varieties like 'Fuyu' and 'Jiro' produce reliably in Valencia's frost-free environment. They're also relatively drought-tolerant once established and thrive in the warm, dry conditions.
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Frost data: NOAA Climate Normals 1991-2020, station USW00023130. Local microclimates can shift these dates by a week or more.
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