ound $10 if you can find conventionally grown bundled plants locally, to around $20 if you order in organic plants from a specialty retailer and pay shipping.
When your onion plants arrive, remove them from the shipping box, seperate them gently, and keep them in a cool, well ventilated place until you can transplant them into your garden. Unless the package instructions tell you otherwise, don’t soak your onion plants or anything.
Plan to transplant your onions promptly once they arrive to you. I’ve gotten distracted around the time my onion plants arrived and neglected to plant them for a few weeks. They will survive such neglect – but that kind of trauma sucks resources from your baby plant that would otherwise go into rapid early-season growth.
Larger onion plants will grow into larger onions. Prioritize planting the thickest, stockist looking plants. To transplant, amend and loosen your soil, then plant the onions about 1-inch deep, just below the point where the white part of the onion changes to green. Firm and water the onion plant in, and give it a gentle little tug to make sure it’s standing up nice and tall in the soil.
As with sets, space your onion plants about 4-inches apart for full size bulbs, or about 2″ apart if you plan to thin and eat the thinning as spring onion. For massive onions (especially if growing large types like Walla Walla) wider spacing is appropriate.
What’s your best tip for growing top quality onions?28