Timing. The type of grass will determine whether to aerify in the fall or in the summer. Lawns composed of cool-season grasses such as Kentucky bluegrass and tall fescue are best aerified in the fall, when there is less heat stress and danger of invasion by weedy annuals.
Vitamins and minerals are essential nutrients your body needs in small amounts to work properly. Most people should get all the nutrients they need by eating a varied and balanced diet.
4. Zinc. Zinc plays an important role in the body's immune system and deficiency is rare because of the readily available food sources. The Recommended Dietary Allowances for zinc are 11 mg per day for men and 8 mg per day for women. For the vegetarian or vegan, legumes, oats, nuts and seeds are rich zinc sources.