Planting calendar
March Planting Guide for Philadelphia, PA: Raised Beds, Containers & In-Ground Gardens
In March, Philadelphia gardeners can begin planting cool-season crops directly in raised beds, containers, or in-ground gardens. This is the ideal time to sow hardy vegetables and start warm-season plants indoors to prepare for transplanting after the last frost. Focus on crops that tolerate early spring conditions and plan for succession planting.
Plant now (quick list)
spinach, lettuce, kale, radishes, peas, carrots, onions (sets or seedlings), potatoes
Plant now
- spinach
- lettuce
- kale
- radishes
- peas
- carrots
- onions (sets or seedlings)
- potatoes
- broccoli (transplants)
- cabbage (transplants)
Start indoors
- tomatoes
- peppers
- eggplants
- basil
- celery
- cucumbers
- melons
- pumpkins
- squash
- herbs like parsley and dill
Avoid
- beans (direct sowing)
- corn
- warm-season crops outdoors
- tender herbs outdoors
- sweet potatoes
- eggplants outdoors
- cucumbers outdoors
- tomatoes outdoors
- peppers outdoors
- melons outdoors
Next 2 weeks
- harden off broccoli and cabbage transplants
- continue sowing peas every 2 weeks for succession
- prepare soil by adding compost and tilling
- monitor soil moisture to avoid waterlogging
- start planning warm-season crop transplant dates
- thin early-sown carrots and lettuce
- watch for late frost warnings
- clean and disinfect containers and tools
- mulch around early plantings to retain moisture
- start trellises or supports for peas
FAQs
Can I plant tomatoes outdoors in March in Philadelphia?
No, tomatoes are frost-sensitive and should be started indoors in March and transplanted outdoors after the last frost, usually in mid to late May.
When is the last expected frost date in Philadelphia?
Typically, the last frost date is around mid-April to early May, but it can vary, so monitor local weather forecasts closely.
How do I protect early plantings from late frosts?
Use row covers, cold frames, or cloches to shield young plants from frost and remove covers during sunny days to prevent overheating.
Is it better to plant peas in raised beds or containers?
Peas grow well in both raised beds and containers as long as they have support for climbing and well-drained soil.
Should I fertilize my garden before planting in March?
Yes, incorporating compost or balanced fertilizer into the soil before planting helps improve fertility and supports healthy early growth.
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