My cornflowers have lots of seed heads which I am going to collect, but what do I do with the old plant, cut it back to the ground or throw away and reseed in spring?
Depends on whether they are annual or perennial. The annual ones you can pull up and put on the compost heap. Reseed in spring. The perennial Centaurea montana, gets a cut down after flowering. Leaves die down for winter, then regrow in Spring.
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Depends on whether they are annual or perennial. The annual ones you can pull up and put on the compost heap. Reseed in spring. The perennial Centaurea montana, gets a cut down after flowering. Leaves die down for winter, then regrow in Spring.
Your help is much appreciated and as I have the annuals now know what to do with them
Yes, Jo.
Water it well the night before. Dig it up and it will usually break into clumps.
Fertilise the area now with some bonemeal so that it makes new roots.
Replant each section, cutting off most of the top growth, and water in well.
Fertilise in spring with a general fertiliser or fish, blood and bone organic fertiliser.