fert. question

[fighters2]

i heard that the n fert should be higher then the P and K for the ratio (and that the P and K fert. should be more or less the same.) i have soil thats 64/21/10. could i use this for the veg. stage? and is there anything i could add that had (P) and (K) in it if that was not enough.

[dylan]

64 seems high for the nitrogen. i use 20/20/20 for the veg phase, and then add some 2-1-4. but for the flowering phase i lower the nitrogen to about 10, raise the phohphorus to about 30-40, and keep the potassium about 20-30.

[I.B.Token]

Originally Posted by fighters2

i have soil thats 64/21/10.

Should those numbers have a decimal point in front of them? Does it read N=.65, P=.21, & K=.10? With that much nitrogen your plants would be on fire. lol

[dan-o]

The ratio of macronutrients depends on the stage of the plant's growth. Vegetative growth is primarily asexual rep. of chlorophyllous tissue. Since Nitrogen (either as nitrate or ammonium nitrate) is a component of chloropyllous tissue synthesis - you are going to want to have a higher ratio of N for veg.

I generally use a an organic based fert for both veg and flowering - with a lower concentration (in order to prevent toxication). If you want to 'suppliment' for macronutrients then i would suggest Fish emulsion for N, Bat guano for P, and Worm castings for K. This supplimentation might not be enough to work for a 'stand alone' fert so that is why i recommend you go with an organic based fert like Fox Farm.

Go with Fox Farm Grow Big for Veg, and FF Tiger Bloom (2-8-4) and/or Big Bloom for FLowering.

General rule of thumb is that you need higher N for veg growth, and higher P/K for blooming. Just stay away from insanely potent chem ferts, because you will most likely burn the shit out of them.