Running short of water. Check the soil with a trowel to know for certain.

Have suspended over water reservoirs with wicks to assure constant water supply, so don't think lack of water is the problem...any other ideas? Thanks!

Are these in containers? If so, what size are the containers? How much direct sun? Wicking systems are often insufficient to keep a plant moist outdoors. Check moisture in the soil.

Sojourner

One plant in five gallon container. Same containers I have indeterminate tomato plants, now 6+ feet high, in over the same reservoirs....each bucket has six wicks, have seen no wilting of tomatoes or eggplant, check soil moisture regularly. Eggplant get mostly full sun until late afternoon, buckets are shaded....they've been lush and doing fine with about eight fruit plus per plant.