NPK

1. Nitrogen(Thazai Chathu) – Aids plant for growth, atmosphere contains 78% nitrogen but plant cannot consume directly from atmosphere. So microorganisms(punchai vagaigal) like rhizobium in soil absorbs nitrogen from atmosphere and supplies it through root. Adding urea is a form of adding nitrogen to soil artificially. To aid this happen naturally you can use Azospirillum mixed to soil during initial stages of plant growth.
2. Phosporous(Manichathu) – Helps in flowering. Adding Phosphobacteria to soil helps breaking the phosphorus in soil so it could be absorbed by root of plants
3. Pottasium(SambalChathu) – Found in wood ash or banana peelPtotashbacteria

Note

• Instead of directly mixing Azospirillum and Phosphobacteria to soil add 10 grams for one grow bag along with vermicompost
• Note the expiry date while buying. Keep it in a wet place away from sunlight to prevent micro organism to prevent perishing

Trichoderma viridi and Psuedomonas viridi – Both are for soil fixing microorganism. Should be used along with soil or can be used for seed treatment ()