Q. My lilacs are older and most of the flowering is up high (7 ft).

However the lower part of the part of the bush does'nt really flower. I was thinking of cutting them back in the fall , we have 4 of them but was worried that it may not be the proper thing to do. Also what/when should I feed them. I hear that lime is good for them. Please advise, thank you

Answer

Pruning lilacs is limited, since cutting back partially will cause the branches to stop blooming for several years. To rejuvinate a tall lilac, remove 1/4 to 1/3 of the branches at the soil line each year. Choose the older branches first. The new growth will bloom in a few years on growth on the lower part of the shrub. The only other pruning that doesn't stop blooming is to remove the spent flowers after blooming each year. Broken or dead  branches can be pruned back, but the resulting branch will not bloom for awhile.

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  • Last Updated Jan 08, 2019
  • Views 18
  • Answered By Aska Gardener

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