Back. 1  Vitacost Chromium Picolinate -- 500 mcg - 300 Capsules. 4.5 out of 5 stars 11. 2  Vitacost Strontium -- 680 mg per serving - 240 Vegetarian Capsules. 4.6 out of 5 stars 19. 3  Vitacost Glucomannan -- 2000 mg per serving - 180 Capsules. 3.7 out of 5 stars 51.
The most common cause of marijuana leaf cupping aka leaf margin rolling, leaf margin burn, and leaf tip curl/burn is overzealous use of marijuana plant food. In relationship to factors such as marijuana plant vigour and rate of growth. Leaf burn is often the very first sign of too much marijuana fertilizer.
Pests. Pests like aphids, thrips, mites and whiteflies cause leaf curl on pepper plants with their feeding activities. Mature leaves may develop spotted or stippled areas, dry out or fall off, but leaves fed on during development emerge randomly curled or twisted, depending on the location of the feeding.nvironmental Stress. Environmental problems are often at the root of pepper plants with leaf curl. Pepper leaf curl regularly appears on hot days, during the middle of summer â hot winds combined with low humidity cause leaves to cup in self-defense.