Planting calendar
March Planting Guide for San Antonio, TX: Raised Beds, Containers & In-Ground
March in San Antonio is ideal for planting a variety of vegetables and herbs in raised beds, containers, and in-ground gardens. Focus on cool-season crops and start warm-season seeds indoors to get a jump start on spring. This guide helps you choose what to plant now, what to start indoors, and what to avoid for a successful garden.
Plant now (quick list)
lettuce, spinach, kale, carrots, radishes, onions, broccoli, cauliflower
Plant now
- lettuce
- spinach
- kale
- carrots
- radishes
- onions
- broccoli
- cauliflower
- peas
- strawberries
Start indoors
- tomatoes
- peppers
- eggplants
- basil
- marigolds
- zinnias
- cucumbers
- squash
- melons
- pumpkins
Avoid
- beans (wait until soil warms)
- corn (too early)
- sweet potatoes
- cantaloupe (direct sow later)
- okra (too early)
- southern peas
- cucumbers (direct sow later)
- tomatoes (direct sow now)
- peppers (direct sow now)
- eggplants (direct sow now)
Next 2 weeks
- harden off indoor seedlings before transplanting
- prepare soil with compost for warm-season crops
- monitor for late cold snaps and protect tender plants
- thin seedlings in raised beds and containers
- start direct sowing beans and corn as soil warms
- mulch around cool-season crops to retain moisture
- check irrigation systems for early spring use
- prune dormant shrubs and fruit trees
- watch for early pests like aphids
- rotate crops to prevent soil depletion
FAQs
Can I plant tomatoes directly in the ground in March in San Antonio?
It's best to start tomatoes indoors in March and transplant them outdoors after the last frost, usually in late March or early April.
When should I start warm-season crops like peppers and eggplants?
Start warm-season crops indoors in March and transplant them after the soil has warmed and the danger of frost has passed.
Are raised beds better than in-ground for early planting?
Raised beds warm up faster in spring, making them ideal for early planting and extending your growing season.
How can I protect seedlings from late cold snaps?
Use row covers, cloches, or lightweight blankets to shield young plants during unexpected cold weather.
What vegetables should I avoid planting in March in San Antonio?
Avoid planting warm-season crops like beans, corn, and okra directly in March; wait until the soil is consistently warm.
Next steps
Get a personalized planting plan
Answer a few questions and generate a plan for your exact location and setup.
Build your garden shopping list
Get a starter kit checklist for what you want to grow (with optional links).
Ask GrowGardens AI
Get quick answers and next-step guidance for your garden.
Want this page for a different city? Try the tool and enter your ZIP: Plant this month.