these are the numbers that I prefer most for bloom
100ppm N
75 ppm P (a bit on the high end but I don't have to add phosphoric acid to ph adjust )
150 ppm K
80 ppm Ca
50 ppm Mg
heres how I mix it
5 gallons finished concentrate = 640 gallons finished solution
mix at a rate of 1oz part A and 1 oz part B per gallon for a finished EC of 1.2 (+/-)
part A
1000 grams calcium nitrate
400 grams potassium nitrate
400 grams magnesium nitrate
64 grams iron dtpa
part B
800 grams monopotassium phosphate
1000 grams magnesium sulfate (aka Epsom salt)
5 grams solubor (boron)
7 grams Manganese sulfate
0.3 grams molybdenum
1 gram zinc sulfate
0.5 grams copper sulfate
fill two 5 gallon bucket half way with hot water
label each bucket either A or B
add fertilizer salts at weights above in corresponding buckets and stir until dissolved
then top off until buckets are full with equal portions water in each bucket
for the micro nutes youll need a good scale to measure the small increments
I buy it all here
https://customhydronutrients.com/
if growing in soil I will use this mix for veg and bloom and supplement with a little fish for extra N during veg
its a little heavy in P which some might not like but its easy to mix and nice round numbers
this mix will work good for all of bloom but some might prefer another ratio for veg with less P and more N if growing in a non buffering medium
this mix at 1oz per gallon is pretty mild at a low EC, if you prefer a stronger feed/EC increase the amount of part A&B equally
its a nice well balance mix
for bloom it has the slightly high P and yet its not lacking in N
comparatively a true lucas (1:1:2) bloom formula would look like this (in the same EC range)
75ppm N
75 ppm P
150ppm K
so my mix is like the lucas but has more N (25ppm) which is what the lucas lacks
if you compare my recipe to the floranova bloom
the floranova bloom at 9.5mls per gallon yields
100ppm N
88ppm P
146 ppm K
50ppm Mg
100 ppm calcium
so my mix is about the same but with slightly less P and slightly less Ca (source water dependent)
another option would be to just do the direct addition if your reservoir is of good size
then youd just add directly to your reservoir
per gallon
1.6 grams calcium nitrate
0.6 grams potassium nitrate
0.6 grams magnesium nitrate
1.2 grams mkp
1.6 grams magnesium sulfate
0.1 gram peters S.T.E.M. (micro nute mix) contains all the micros and the iron in one powder
(not to be used in concentrate, direct addition only )
so if your reservoir was 50 gallons
that would be
80 grams calcium nitrate
30 grams potassium nitrate
30 grams magnesium nitrate
60 grams mkp
80 grams magnesium sulfate
5 grams peters S.T.E.M
what you might do is fill the reservoir up half way...add your dry salt fertilizer powders and mix
then add water topping off until the desired ppm/EC is reached
same deal only for veg recipe
1 oz per gallon of part A&B
to make 5 gallons concentrate
part A
1300 grams calcium nitrate
400 grams potassium nitrate
400 grams magnesium nitrate
64 grams iron dtpa
part B
400 grams mkp
1000 grams magnesium sulfate
250 grams potassium sulfate
5 grams solubor (boron)
7 grams Manganese sulfate
0.3 grams molybdenum
1 gram zinc sulfate
0.5 grams copper sulfate
or direct addition per gallon
2 grams calcium nitrate
0.6 grams potassium nitrate
0.6 grams magnesium nitrate
0.6 grams mkp
1.6 grams magnesium sulfate
0.4 grams potassium sulfate
0.1 grams peters S.T.E.M.
122 N
36 P
151 K
50 Mg
100 Ca
you can plug those numbers into hydro buddy and itll give you some mix ratios
theres more than one way to get to those numbers and hydro buddy might automatic choose a different ratio of mixing to get the same result
but these numbers, like I said are easy and rounded in weights to easy whole numbers