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Yellow aconites (pictured right) are fading and their foliage will soon die back. If you want to increase their numbers, dig out the largest clumps now. Mature aconite tubers will be large and knobbly, but they are also brittle and easy to break up.
Use your fingers to snap the t ubers at t heir natural weak points — as you would a chocolate bar. Try not to damage the foliage and leave spent flowers untouched.
These will produce seed in a few weeks and help increase the number of plants.
Re- plant your divisions deeply enough to bury the tubers and the whitest parts of the stems.
Gently firm the soil round each plant and allow the foliage to wither naturally over the coming weeks.
By late April, the aftermath will have disappeared.