By Sjw
gloucestershire,
United Kingdom 
My delphiniums have finished flowering but the leaves at the base of the plants are yellowing and dying, should I cut back to ground level and feed and mulch and see if they regrow or divide and replant instead of waiting until the spring
29 Jun, 2010
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Don't divide. Dead head to the next few leaves down and you may get smaller flowers. A feed would be good. Delphiniums tend to go yellow at the base esp. if they have been short on water.
29 Jun, 2010