Espoma Organic Bio-Tone Starter Plus 4-3-3 Natural & Organic Starter Plant Food with Both Endo & Ecto Mycorrhizae; 18 lb. Bag. Use Bio-tone Starter Plus fertilizer when planting / transplanting all plants. Bio-tone Starter Plus is a rich blend of the finest natural & organic ingredients enhanced with both endo & ecto mycorrhizae and our exclusive Bio-tone formula; 4-3-3 Fertilizer analysis with 5% calcium. It is environmentally Safe - No sludges or toxic ingredients. Use Bio-tone Starter Plus fertilizer when planting / transplanting. Mix thoroughly with soil used to backfill the planting hole so the Bio-tone Starter Plus is in the plant root zone. It is ready to use and requires no mixing. Bio-tone Starter Plus is approved for organic gardening; It is a registered Organic Input Material meaning it meets all requirements for organic production. Product of the Espoma Company.