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What can be done to help ailing gardenia?

Gardenias have similar needs as roses. Their health and growth respond best to wood chip mulch decomposing on the soil surface.

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Calcium is abundant in desert soils but slow to release

Q: Are eggshells good for your garden and should they be added to your compost? Conventional garden wisdom says yes, but I believe that we have too much calcium already in the soils here in Southern Nevada, so adding eggshells is not a good idea. What do you think?

Weed killer may cause yellow leaves on pomegranate

Q: Eleven of my 50 young pomegranate trees have leaves yellowing and dropping off. I water this area once a week by flooding. I sprayed a weed killer, 2, 4-D, near the pomegranates, but I protected each one with plastic to avoid damaging the trees. Where did I go wrong here? If the weed killer is the problem, is there any way to save them?