Question
I am looking for an online source of seedling fertilizers (e.g. retailer). We are growing seeds indoor under flourecent lights and have sofar used the commercial 15-30-15 miracle grow diluted to seedlings strength.

the more we read about it we understand that it can be preferred to use formulars such as 20-10-20 to keep growth in check indoor (low phosphores fertilizers), and also some seeds (like geranium) prefer fertilizers which has no ammonium nitrate or urea forms (most common ingrediences in soulble fertilizers found at all stores we checked).

E.g. I guess water souble fertilizers for the greenhouse industry...

Can you provide some references to online retailers who sell fertilizers specifictly for seedlings, or at least some more uncommon types such as 20-10-20, "geranium specials", etc.
Tks..

Answer
peters (20-10-20, 20-15-20, 20-20-20, etc.) and grace (miracle grow) (6-4-3, 8-6-2, etc.)make most of the plant fertilizers for horticultural growers. hoffman and numerous others also make fine fertilizers. you want something w/the insoluable salts removed for indoor plants. find a greenhouse supplier (gieger, etc.) in the yellow pages or on the internet that will ship into your area. for a retailer by you visit a larger garden center/nursery in your area. they can order from their suppliers bulk ( 5 lb, 50 lb, etc/ bags or pails)quantities. sounds like you may be ready to order from wholesale suppliers. subscribe to a magazine like American Horticultural Society or other. get the source off the internet or local library. the composition of the fertilizer will make all the differences for individual crops.