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.
The damage may appear as tiny or large holes in the leaf, or as irregularly shaped leaves with jagged edges. If plant leaves are still growing when the insect feeds, the damage may later appear to have smooth edges around the feeding holes. Only insects cause these types of damage. Leaf curling, puckering or rolling The saliva of some sucking insects, especially aphids, may cause plant leaves to fold, curl or pucker. These insect symptoms can be confused with some plant diseases that cause similar symptoms.