Higher Ground Garden Blog

Saturday, March 12, 2016

Growing onions from seeds

This year Carol will try starting onions from seed in our house.  Julie suggested this last year.  They will be Walla-walla and Cortland onion seeds.  Last year we had poor quality live starts and it's expensive ($10 seeds vs. $100 for live starts and bulbs).

https://www.youtube.com/watch?v=IehuyOPf2dU

Some details gleaned from several websites:

- Plant seeds 8-10 weeks before last frost (early March should be ok for us)
- Plant in clean flats of moist potting soil, ~1000 seeds scattered across a 10X20" flat. Drainage holes not needed, but if there are holes can be covered with newspaper. Cover with 1/4" soil, pat gently, water gently.
- Cover with plastic top until ~ 50% have germinated, then uncover. Generally poor germinators, about 75%.
- Keep warm, 70-80 degrees is good, they'll germinate slower in cooler temps.
- When tops get tall they can be trimmed to about 4-5", use tops in cooking
- Keep slighlty watered.
- Start to harden off when several inches tall, or at least match stick diameter, but bring them in before it gets cold at night.
- Can be transplanted after most frost danger is over. Well fertilized soil, well drained, consistently moist, weed free.

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