Pruning ancient plant of large snowball variety

woost2August 30, 2008

A very large plant that has been on our lakefront for decades had a bad season last year -- drought followed by biblical rains followed by over 100 inches of snow, with ice on the lake into April. I don't know what it is. Its flowers are large, white, drying to pale green. It is tall and wide.

It had lots of dead branches this year which did not get pruned. It is not its former robust self this year. I can guess that this plant has never been watered and never been fertilized. It's in a public/common area, so no one really takes ownership of it.

So, if I choose to take it on in the spring, what should be my course of action, beyond cutting out all the dead wood?

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luis_pr

Do a soil test and fertilize after the results are in. Pay attention to the soil pH and to the level of secondary and micro nutrients (or lack there of). Mulch heavily (4" of any type of acidic mulch).

Phosphorus and pottasium move very slowly in the soil. If you apply some now, assume that it will reach the roots in about 6 months. I would apply some bone meal six months before normal leaf out occurs.

Hydrangeas require very little fertilization so one application in June (if you live in the north) or two applications in May and July (if you live in the South) should do it. Coffee grounds during the growth season are ok but stop all fertilizers in August-September. Try using cottonseed meal or manure. For a new small shrub, 1/2 to 1 cup is fine; you will need more for a bigger older bush.

Pruning is another story since aesthethics also come into play. You may want to hard prune the bush but I was wondering if you could post a picture so we all could see what you are seeing.

    Bookmark   August 30, 2008 at 11:51PM
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