• Vitamins are essential for the growth and development of plants. Vitamins are organic compounds providing essential nutrients, and are proven to help plant growth. Vitamins help reduce general stress and increase the immunity of plants toward disease and rough climate. The ideal vitamin required for growth may depend on the type of plant being grown.
  
  

Vitamin C

• Vitamin C, or ascorbate, is considered to be the class of vitamin which renders maximum help to increasing a plant's growth. This vitamin helps plants to cope with stress, photosynthesis, climate changes and protects plants from ultraviolet rays. 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. The enzyme helps control the amount of vitamin C in a plant. Scientists are studying the enzyme in an effort to boost crop yields.
  
  

Vitamin D

• Vitamin D3 is the best for plant growth. While Vitamin D2 is also considered to be good, Vitamin D3 helps with better absorption of calcium in the plant stems. It is especially important in vegetative propagation where roots are grown via cutting. Vitamin D and associated compounds are great growth materials and have a positive effect on adaptive root response in stressful situations.
  
  

Vitamin B

• Studies published in "Botanical Gazette," published by University of Chicago Press, tell the importance of Vitamin B1 or thiamine hydrochloride in plant growth. Along with other nutritional supplements, when Vitamin B1 is added to a plant, there is a rise in its growth. It is of special importance for enhanced root formation of some plants. Vitamin B6 and Vitamin B12 are also important for healthy plant growth.