I'm about 3-4 weeks in on a single plant in soil. The cotyledons are yellow and the stipules are about 1/8" long now. Judging from the pics on here, it's got the long narrow leaves of a sativa.
I'm about to start feeding it now (Thx LudaCris !) and I'm looking for some 20-5-5.
I haven't seen that ratio at any of the local garden centers...what else is it used for ?
Also, they have 5-1-1 fish fertilizer. Can I just mix it 4X stronger to give me 20-4-4 instead ? (1 tbsp/quart instead of 1 tbsp/gal)
Otherwise it'll have to be something like 20-20-20 general purpose fertilizer.
I've got some fresh pics in my grow thread (link's in my sig)
If you can get hold of certain commodity chemicals, they work a charm. You could make 20-5-5 by using 1/4 strength of the 20-20-20 mix, to get you 5-5-5, then adding about double as much as urea (a common fertiliser, see if you can get hold of it).
Eg, if youd usually use 40g of the 20-20-20 mix, use 10g of that and add 20g of urea.
If you can get these sorts of chemicals, let me know and i can give you some more formulae. If you live in the UK, I know where you can get them