However, you can assist a plant that is deficient in any one of these vitamins by giving it a fertilizer that contains these vitamin supplements. There is no reason to take vitamin supplements if you eat a healthy whole food plant-based diet. As for Vitamin D, 15 micrograms per day is the sweet spot. Nature has been making vitamins much longer than we have. "Vitamin C can also be made in a laboratory." Adding a multivitamin rich in A, the B vitamins, C and E and pantothenic acid can help maximize the yield of vegetables and make plants grow larger. Vitamin D3 helps root formation and seed germination, explains the "Journal of Plant Growth Regulation." The difference between expired and non-expired vitamin tablets is the expired ones are possibly going to be less potent. The vitamin C per serving is 300 mg. Now look at the amount of natural vitamin C in the following servings of fruits and vegetables: Guava - half a cup contains 188 mg Vitamin C also helps the body absorb iron, which is needed for red blood cell production. Most plants are able to produce their own vitamin C, and folic acid can be found in high levels naturally in some plants. (Medline Plus, 2011) "Most vitamins cannot be made by the body, such as vitamin C. Vitamin C is important for bones and connective tissues, muscles, and blood vessels. That’s why, at NATURELO, we like to follow nature’s recipe. Several multivitamin formulas on the market are formulated just for plants, or you can use liquid vitamin compounds formulated for humans to a plant's water supply. The study in The Plant Journal describes a newly-identified enzyme, GDP-L-galactose phosphorylase, which produces ascorbate ( vitamin C ) in plants. Nature doesn’t make vitamin C in isolation. The vitamin C per capsule is 120 mg. 2) Product B has 90 servings for $33.50. i used a crushed aspirin for a pick me up tonic for a plant last year and it worked a treat,also i used a banana skin in water shaken in a bottle ,kept over night and this also worked as a help for plants not looking there normal self,im told the vit C works as well iv not tried it … Here are two examples of natural vitamin C products I found: 1) Product A has 90 capsules for $24.99. Plants that are naturally rich in vitamin C also include important co-factors and co-nutrients, such as bioflavonoids, that support the action of vitamin C in the body. What are the preferred sources of vitamin C? This vitamin helps plants cope with stress, photosynthesis and climate changes, and protects plants from ultraviolet rays. Folic acid especially is present in dark green leafy vegetables. Plants cannot mature without vitamin C. Scientists from the University of Exeter and Shimane University in Japan in 2007 found that an enzyme called GDP-L-galactose phosphorylase produces vitamin C in plants. For example; farms, orchards, greenhouses, nurseries and other places that grow crops, plants or trees are some of the many ways we get our food (fruits, vegetables and grains) through agriculture. Ascorbic acid (vitamin C) occurs naturally in foods such as citrus fruit, tomatoes, potatoes, and leafy vegetables. Vegetables and fruits are good sources of vitamin C. You can see analytically the list with the richest foods in vitamin C here. The NIH recommends 90 milligrams of Vitamin C per day for men and 75 milligrams for women. Vitamin D3. This discovery could have implications for agriculture and for the production of vitamin C dietary supplements. Vitamin C supplements may interact with other drugs.