Confusing info' re: onions sets (planting conditions)
I'm totally confused by the conflicting advice about ground preparation for planting onion sets I'm receiving from the RHS and Gardeners World (I thought that they worked closely together).
I've just read in my "Gardeners World" mag the basics of crop rotation. For Plot 4 "Onions and Roots" it advises "Don't add manure or other organic matter to the soil. Fork through to loosen the soil and lightly firm down . Don't add lime or high nitrogen fertiliser but do apply a phosphate feed."
Onions do not thrive on acid soils (below pH 6.5). Reduce acidity by applying lime in autumn and winter. Apply two bucketfuls of well-rotted manure or other organic matter such as garden compost every square metre (yard). This will help add nutrients, improve the soil structure and hold moisture. Little fertiliser is required at planting, apply 35g per sq m (1oz per sq yd) of Growmore or twice as much organic fertiliser such as dried poultry manure pellets. If you cannot apply organic matter – use more fertiliser, up to twice as much if the soil is poor.
I've been working my allotment for about 20 yrs and I more or less apply one of these methods (I'm not saying which just yet). So unless recommended growing methods have recently changed I don't know which advice to believe!
What say you?