Planting calendar
March Planting Guide for Washington, DC: Raised Beds, Containers & In-Ground Gardens
March is an ideal time in Washington, DC to start cool-season crops directly in raised beds, containers, and in-ground gardens. Focus on hardy vegetables and herbs that tolerate early spring conditions, while preparing to start warm-season plants indoors for later transplanting.
Plant now (quick list)
spinach, kale, lettuce, radishes, peas, carrots, onions, chard
Plant now
- spinach
- kale
- lettuce
- radishes
- peas
- carrots
- onions
- chard
Start indoors
- tomatoes
- peppers
- eggplants
- basil
- broccoli
- cauliflower
- cabbage
- herbs like parsley and oregano
Avoid
- beans
- corn
- cucumbers
- squash
- melons
- sweet potatoes
- warm-season annual flowers
Next 2 weeks
- harden off indoor seedlings before transplanting
- continue sowing peas and spinach outdoors
- prepare soil with compost for summer crops
- monitor soil moisture to prevent seed rot
- start planning trellises for climbing plants
FAQs
Can I plant tomatoes directly outdoors in March in Washington, DC?
No, tomatoes are sensitive to frost and should be started indoors in March and transplanted outdoors after the last frost, typically in mid to late April.
How do I protect early spring seedlings from late frosts?
Use row covers, cloches, or cold frames to shield seedlings during unexpected cold snaps.
Is it better to use raised beds or containers for early spring planting?
Raised beds and containers warm up faster than in-ground soil, making them ideal for early spring planting of cool-season crops.
When should I start hardening off seedlings started indoors?
Begin hardening off seedlings about 1-2 weeks before transplanting outdoors by gradually exposing them to outdoor conditions.
What soil preparation is recommended in March?
Incorporate compost or well-rotted manure to improve soil fertility and structure before planting.
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