Planting calendar
March Planting Guide for Indianapolis, IN: Raised Beds, Containers & In-Ground
In March, Indianapolis gardeners can start planting cool-season crops directly outdoors and begin warm-season seeds indoors. This month is ideal for preparing raised beds, containers, and in-ground plots with early vegetables and herbs that tolerate cooler soil temperatures.
Plant now (quick list)
leafy greens (spinach, kale, lettuce), peas, radishes, carrots, onions sets, potatoes, broccoli transplants, cabbage transplants
Plant now
- leafy greens (spinach, kale, lettuce)
- peas
- radishes
- carrots
- onions sets
- potatoes
- broccoli transplants
- cabbage transplants
Start indoors
- tomatoes
- peppers
- eggplants
- basil
- celery
- cucumbers
- melons
- pumpkins
Avoid
- warm-season crops outdoors (tomatoes, peppers, eggplants)
- corn (too early for direct sowing)
- beans (wait for warmer soil)
- summer squash
- sweet potatoes
Next 2 weeks
- harden off broccoli and cabbage transplants
- prepare soil by adding compost to raised beds
- monitor soil moisture to avoid waterlogging
- start succession sowing of peas and radishes
- clean and disinfect containers before planting
- apply mulch to protect early seedlings from frost
FAQs
Can I plant tomatoes outdoors in March in Indianapolis?
No, tomatoes should be started indoors in March and transplanted outdoors after the last frost, typically in mid to late May.
When is the last frost date for Indianapolis?
The average last frost date is around mid-May, but always check local forecasts before planting frost-sensitive crops outdoors.
How do I prepare raised beds for March planting?
Clear debris, loosen soil, and incorporate compost or well-rotted manure to improve fertility and drainage.
Can I reuse soil from containers last season?
It’s best to refresh container soil with new potting mix or amend old soil with compost to reduce disease risk and replenish nutrients.
What are good companion plants for peas in March?
Carrots, radishes, and leafy greens grow well near peas and can be planted simultaneously in raised beds or containers.
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