Best Fertilizer for Evergreen Shrubs

What is the BEST fertilizer to use on the following evergreen shrubs and trees (We’re in SANDY soil in Blythewood, SC)?

Shrubs: lorapetalum, privets, abelias, knock out roses.
Trees: crepe myrtle, loquats and magnolia

I’ve used osmocote slow release but don’t see much improvement. Is Black Cow Compost better or worse than Mushroom Compost?

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1 Comment To "Best Fertilizer for Evergreen Shrubs"

#1 Comment By Nikki On 05/18/2011 @ 7:23 am

For shrubs and trees that are grown for foliage, use a nitrogen rich fertilizer. For shrubs and trees that are grown for flowers, use a phosphorus heavy fertilizer.

It will depend on a lot of things. Mushroom compost is actually cow manure compost, just that it was used to grow mushrooms in. Which is better will depend on the mix that was packaged by the packagers. Look on the bags for the nitrogen amount or the N-P-K. Whichever has the higher numbers is the better one.

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