Planting calendar
March Planting Guide for Portland, OR: Raised Beds, Containers, and In-Ground Gardens
March is an ideal time to start cool-season crops in Portland, OR. You can plant hardy vegetables directly in raised beds, containers, or in-ground, while starting some warm-season crops indoors. Be cautious of late frosts and prepare your soil accordingly.
Plant now (quick list)
peas, spinach, kale, lettuce, radishes, carrots, onions (sets or transplants), broccoli
Plant now
- peas
- spinach
- kale
- lettuce
- radishes
- carrots
- onions (sets or transplants)
- broccoli
- cauliflower
Start indoors
- tomatoes
- peppers
- eggplants
- basil
- melons
- cucumbers
- summer squash
Avoid
- beans
- corn
- cucumbers (direct sow)
- tomatoes (direct sow)
- peppers (direct sow)
- eggplants (direct sow)
Next 2 weeks
- harden off seedlings started indoors
- prepare soil with compost and mulch
- monitor soil moisture to prevent waterlogging
- start succession planting of leafy greens
- watch for late frost warnings and protect young plants
FAQs
Can I plant tomatoes directly in the ground in March in Portland?
No, tomatoes should be started indoors in March and transplanted outdoors after the last frost, typically in late April or early May.
How do I protect seedlings from late frosts?
Use row covers, cloches, or bring containers indoors overnight to shield young plants from frost damage.
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 and well-draining soil.
When should I transplant seedlings outdoors?
Transplant after the last expected frost date when soil has warmed, usually mid to late April in Portland.
What soil preparation is recommended in March?
Incorporate compost or well-rotted organic matter to improve soil fertility and drainage before planting.
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