Chemical salt fertilizer recipe (for flowering) needed! very urgent!!

Hello,
I want to prepare my own nutrient solution by using chemical grade salt's according to chemist's salt fertilizer recipe (look at GROWFAQ). I will be growing lowryder2's. Another page in the GROWFAQ says that a proper flower type solution should have around 1200 ppm, but the one on the chemist's salt fertilizer recipe (flower mix -cola diet) only has around 600 ppm, no way enough nitrogen or phosphate for flowering. I have been trying to modify the formula in to a proper flowering solution but I can't do it. Is there anyone out there that knows a recipe for flowering that uses chemical salts (K2SO4 etc.)? I would really appreciate any help on the matter. Thanks!

I am posting the two different pages from GROWFAQ, the recipe given in flower mix doesn't match the ppm requirments given below! How can I adjust the formula?? HELP PLEASE!




ChristianKungFu - TDS, PPM, and EC


FLOWER MIX - COLA DIET

To make 50 liters of Cola Diet(this provides N 75 P 100 K 150 Ca 200 Mg 75 S 185):

Calcium sulfate dihydrate (gypsum) 20.4 g
Epsom salt 37 g
Potassium sulfate 2.61 g
Potassium dihydrogen phosphate 21.93 g
Calcium nitrate tetrahydrate 30.5 g
MES 4 g

I weighed out the dry salts and dissolved them directly in the reservoir. The gypsum was the last item in, and it did dissolve. Using RO water the TDS on my Oakton pen read around 800. Nice and gentle on the ladies' feet.

A 50 liter reservoir would be eaten up within 5 days by 20 square feet of canopy.

ChristianKungFu - TDS, PPM, and EC



PPMs for each growth phase
You may desire more N during veg stages for example. The key is NOT to obsess over the exact numbers. Too many experienced growers give advice in exact parameters to appear 'scientific' or something...but there are too many other factors involved in the actual UPTAKE of these nutrients by roots to claim specificity. These are just general parameters that you can tweak under your own conditions. And again, the plant can tolerate more as it gets larger and has more root area to uptake nutes and leaf area to transpire water...start light, gradually increase with each feeding as your lant can handle it.

Keep in mind, my estimates are given for soil mediums which can tolerate higher levels because the soil components will bond with many elemental ions....a hydro system needs to be more precise....I'm not very familiar with those systems. You've read the dislaimer! Also remember that these parameters are based on the assumption of using DISTILLED water. Tap water will add another 200-400 PPMs, so you would have to adjust accordingly...especially with Cl, Ca, Na, and in rare case, S.

SEEDLING (2-3 weeks...look for 4-5 sets of alternating nodes before moving to veg)

N 150
P 100
K 150
Ca 75
Mg 75
S 25-50
Fe 15
Cl 15
Mn 7
Cu 9
Zn 3
Total: 600ppm

VEGETATIVE/PRE-FLOWER (2-4 weeks)

N 300
P 100
K 200
Ca 100
Mg 100
S 50-75
Fe 25
Cl 25
Mn 10
Cu 15
Zn 5
Total: @1000pm

FLOWER (strain dependent-usually 6-8 weeks)

N 300-400
P 400
K 200
Ca 100-150
Mg 100-150
S 100-150
Fe 25+
Cl 25+
Mn 10
Cu 15
Zn 5
Total: @1300-1500ppm

FLUSH/HARVEST (2 weeks)
N 0
P 75
K 75
Ca 50
Mg 50
S 50
Fe 25
Cl 25
Mn 10
Cu 15
Zn 5
Total: @400ppm

fuck.. i already have to water the damn things.. now i have to do MATH too? screw this.. im gonna just start growing shrooms

Yeah, doing the math really sucks...

Anyway, I've made some calculations and I've come up with two recipes; one for the seedling phase and one for the flowering phase. In fact I just took the veg formula recipe from Chemist's Salt Fertilizer Recipe as my seedling solution, and I added some N and P to the flower mix- cola diet recipe for the flowering solution. (used NaNO3 for N, and (NH3)3PO4 for p)

NaNO3 - 15% N meaning 15-0-0 meaning 1 grams/liter= 150ppms
(NH3)3PO4 - 10% N, 45& P meaning 10-45-00 meaning 1 grams/liter= 100ppms of N, 450 ppms of P)

I used these calculations (above) in my recipe, hope it is correct??

Anyway, I will be growing 1 lowryder2 (yes only 1) first 2 weeks, the seedling mix, next 4-5 weeks the flower mix.

Seedling mix recipe: 20lt's worth - won't be needing that much

CaNO3.4H20 - 20 g
KH2PO4 - 4.10 g
K2SO4 - 6.0 g
MgSO4 - 7.0 g
MES Buffer - 2.0 g
(N:100 P:50 K:212 Ca:143 Mg:75 S:11 TOTAL PPM: 700ppm

(the numbers are rounded, they aren't precise)

Flower mix recipe: 20lt's worth
CaSO4.2H2O - 8.16g
MgSO4 - 14.8g
K2SO4 - 1.0 g
CaNO3.4H20 - 12.2g
MES Buffer - 2.0 g
this formula gives (N 75 P 100 K 150 Ca 200 Mg 75 S 185)

I want N 200ppm and P 400ppm for flowering, so I add:
NaNO3 16.6 g 16.6g/liter gives 16.6x150= 2490ppm, in 20 lts reservoir it contributes 2490/20= 124.5ppm
(NH3)3PO4 13.5 g 13.5g/liter gives 13.5x450= 5625ppm, in 20lt reservoir it contributes 5625/20= 280ppm P and 13.5x100/20= 67.5 ppm N

adds up to:
N 140 P 380 K 150 Ca 200 Mg 75 S 185

Do you think this will be a proper mix? I don't know if NaNO3 or (NH3)3PO4 will precipitate with something so if anyone knows please warn me
If people suggest that I don't use this formula, I will buy any nutrient I can find (not much choice where I live) and use it. An contribution or comment or advise is much appreciated!

I dont know anyone who has ever done this this way as its very very work intensive. The different ppm will vary by what product you use just like gh nutes say 800 is thier max for some of there nutes will fox farm runs up to 1500 ppm..You should just buy some and save the head ache and money lol

Actually, that is the problem, the commercial nutrient products you mention are not available in my city, but I have a chemistry lab I can use at the university so it will be pretty easy for me to make the actual mixture , the only problem is that I can't be sure that this recipe is in the proper ppm range. If someone could give me a positive or negative view I can proceed. thanks for all input!

Aah, the hell with it, I'm just gonna use some molasses and fish solution, and add some phosphorus source for the flowering. I read that they don't like too much nutes anyway,

I'm having the same problem...GH (or any other hydro nutes for that matter) is not available here locally, and the shipping rates are nearly twice the cost of the nutrients!!!
Started using chemists salt based formula but am not having very good results. Can anyone help out? (growing AK and Blueberry right now.)

I just bought some random liquid plant nutes from the nearest flourist, one with high nitrogen and one with high phosphorus. I think they will work fine. And I dont use any ph up or ph down also, I just use drinking water, squeeze a lemon in to the bottle to lower the ph. (lemon juice contains nitric acid) I haven't encountered any problems yet.

Thanks for your input! I'm trying the same now...are you mixing it according to the label instructions? I bought some liquid plant nutes and mixed it up as suggested by the label (1:1000 ) but the ppm seems quite low (around 600 ppm, seems a bit low for the budding stage...

Well, did you take a reading right after the feeding? If you measure it after some time the plant uses up the nutes. If you've watered after the feeding that might've washed up some of the nutes. If not, I guess you could try mixing it 1.25-1.50 strength and take a reading but it would be wise to do it cautiously.

took my reading shortly after mixing. Using product similiar to miracle grow, but it doesn't have enough P for budding. the 20-20-20 general purpose seems to be ok on the mothers and girls in veg, but not getting desirable results for those that are budding...It looks like I will still have to shell out the big bucks for the shipping charges and stick with good ol' GH.
I read a few articles last week on using off the shelf fertilizers for hydro, and the general consensus was that these fertilizers are not suitable for hydro--most of these ferts provid nitrogen via urea, which needs to be broken down in soil before it can be absorbed by the plants. (search for using miracle grow for hydroponics, following link leads to a post with the most details: General Hydroponics Nutrients )

btw, chemist's salt fertilizer formula did nothing but kill off all my poor girls (it's a good thing I tried it on just a few ladies!)

cool thread brother.