Onion Sets are small onion bulbs of the size of a large marble, 1.5 to 2 centimeters across.
They are usually heat treated and started into growth before being sold.
Onion ets provide an easier way of growing onions with a greater chance of success.
Onion sets are extremely useful in gardens where onion fly makes seedling onions a precarious crop.
The ground and soil for a bed of onion sets should be prepared as for onion seed.
They can be planted in allotments, raised beds, vegetable plots and patio pots
Onion set planting may be done from March to May, the earlier the better.
When planting make a small a hole in the soil bed with a hand trowel and place the sets in the hole to half their depth with necks uppermost.
The sets should be planted at distances of 9 inches / 20 cm apart in the rows. Rows of onion sets should be 12 inches / 30 cm apart.
Once they have been planted in the soil, onion sets will quickly sprout new roots and begin to grow into full size onions.
The young plants can be covered with netting to prevent them being eaten by birds.
Planting onion sets in September will produce a crop of onions in June to July before the main crop spring sown onions mature.
Once they are established into growth onions grown from sets should be cared for in the same way as onions grown from seed.
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Growing onions from different types of onion sets. Planting onion set. When to plant onion sets. How to grow onions from sets