You may plant in clumps if you want more produce per square foot even though they will be a little smaller.  Harvest scallions whenever you are ready to eat them.  You can try just cutting the greens and see if they will grow back or you can pull them out.  Harvest sweet onions when the bulb reaches a decent size and storage onions when the leaves are 2/3rds brown.  Leeks will stay in the ground through October into November.

Set plants 6–12″ apart, onions 4–6″ in trenches in well-dug beds with generous quantities of organic matter. Avoid transplanting next to grass strips; slugs love to dine on tiny allium seedlings. Irrigate seedlings whenever the topsoil dries out (courtesy of Fedco Seed Catalog).

Leeks · Runner High yielding variety with great holding capacity in the field. Erect plants with upright foliage make for easy bunching and cultivation.NOTE: This item is grown to order only!
Qty: 4 pack · Cost: $5.00 ea
Leeks · Lexton Lexton has the long, thick shank of Megaton in a slower-growing, more cold-tolerant plant. Harvest well into very cold weather, after the early leeks are gone, in the afternoon during a thaw. Lexton had the healthiest foliage of any leek in our 2010 trial · dark blue-green and held upright off the ground. Very little bulbing or splitting, easy to peel, and high yield potential.NOTE: This item is grown to order only!
Qty: 4 pack · Cost: $5.00 ea
Leeks · Megaton Upright plants with beautiful blue green foliage. Long, thick shanks have very high yield potential. Less bulbing and splitting, and easier to peel than open pollinated varieties.
Qty: 4 pack · Cost: $5.00 ea
Leeks · Tadorna Winter leek with stocky, dark green shafts that size up well and hold into the fall. Well adapted to many regions; overwinters in mild climates. Good resistance to leaf blights. NOTE: This item is grown to order only!
Qty: 4 pack · Cost: $5.00 ea >

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