Poinsettia Nutrition – Tables

Table 1 Approximate amount (oz.) of epsom salts to add per 100 gallons of water to make 208 ppm or 182 ppm of supplemental magnesium fertilizer.

 

Injection Ratio 208 ppm Mg 182 ppm Mg
1:300 8400 7350
1:200 5600 4900
1:150 4200 3675
1:128 3584 3136
1:100 2800 2450
1:50 1400 1225
1:30 840 735
1:24 672 588
1:15 420 367.5

Table 2 Amount (fl. oz.) of stock solution*/ 50 gallons of concentrate to make 0.1 or 0.2 ppm supplemental Mo fertilizer.

 

Injection Ratio 0.1 ppm Mo** 0.2 ppm Mo***
1:300 22.50 45.00
1:200 15.00 30.00
1:150 11.25 22.50
1:128 9.60 19.20
1:100 7.50 15.50
1:50 3.75 7.50
1:30 2.25 4.50
1:24 1.80 3.60
1:15 1.13 2.26

* To make Mo stock solution dissolve 1 lb. of ammonium molybdate in 5 gallons of water.
** For use with constant liquid feed.
*** For use with intermittent feed.

Table 3.Parts per million (ppm) of nutrient element in solution when specified fertilizer compound is disolved in water.

 

Fertilizer Fertlizer & Element Percentage Amount/Gal N P K Ca Mg S Cl
Potassium Nitrate 13.75-0-44.5 (36.9K) 1g 36 97 - - - - -
Potassium Sulfate 0-0-50 (41.5K, 17S) 1g - - 110 - - 45 -
Muriate of Potash 0-0-60 (49.8K, 45Cl) 1g - - 131 - - - 119
Mono Potassium Phosphate 0-22.8-28.7 1g - 53 75 - - - -
K-Mag of Sul-Po-Mag 0-0-22 (18K, 11Mg, 22S) 1g - - 48 - 29 58 -
Mono Calcium Phosphate 0-46-0 (20P, 13Ca) 1g - - - 34 - - -
Calcium Nitrate 15.5-0-0 (19Ca) 1g - - - 50 - - -
Ammonium Nitrate 33.5-0-0 1g 41 - - - - - -
Ammonium Sulfate 21-0-0 (24S) 1g 88 - - - - - -
Urea 46-0-0 1g 55 - - - - 63 -
Nitric Acid 7)% HNO3 (15.5N) 1g 121 - - - - - -
Diammonium Phosphate 18-46-0 (20P) 1g 41 53 - - - - -
Phosphoric Acid 75%H3PO4 (0.363g.P/ml) 1 ml 47 96 - - - - -
Gypsum (Calcium Sulfate) (18.6Ca, 14.9S) 1g - - - 49 - 39 -
Epsom Salts (9.9Mg, 13S) 1g - - - - 26 34 -

Note: For practical purposes, 3.5 ounces of fertilizer disolved in 100 gallons of water yields the same ppm of element in solution as those given for 1g./gallon. (28.35gms.=1 ounce)

Table 4.Fertilizer sources for pointsettia production

 

Name & Formula of Material N-P-K Analysis Others
Ammonium Chloride
NH4Cl
25-0-0 0
Ammonium Nitrate
NH4NO3
33.5-0-0 0
Ammonium Phosphate (di)
(NH4)2HPO4
21-53-0 0
Ammonium Phosphate (mono)
NH4H2PO4
11-48-0 1.4% Ca, 2.6% S
Ammonium Sulfate
(NH3)2SO3
20-0-0 24% S
Calcium Nitrate
Ca(NO3)2
15-0-0 37% S
Sodium Nitrate
NaNO3
16-0-0 0
Urea
CO(NH2)2
45-0-0 0
Urea-Formaldehyde 38-0-0 0
Superphosphate
CaH4(PO4)2
0-20-0 18% Ca
Treble Phosphate
CaH4(PO4)2
0-42-0 12% S
Phosphoric Acid
H3PO4
0-52-0 12% Ca
Potassium Chloride
KCl
0-0-62 0
Potassium Nitrate
KNO3
13-0-44 0
Potassium Sulfate
K2SO4
0-0-53 0
MagAmp-Magnesium 7-40-6 18% S
Ammonium Phosphate 0 0
Magnesium Sulfate
MgSO47H2O
0 10% Mg
Magnesium Nitrate
Mg(NO3)2 6H2O
0 9.5% Mg
Gypsum
CaSO42H2O
0 23% Ca
Manganese Sulfate
MnSO4
0 28% Mn
Boric Acid
H3BO3
0 17% B
Copper Sulfate
CuSO45H2O
0 25% Cu
Iron Sulfate
FeSO47H2O
0 20% Fe
Iron Chelates 0 Various % Fe
Ammonium Molybdate
(NH4)6 Mo7O22H2O
0 53% Mo
Zinc Sulfate
ZnSO47H2O
0 36.4% Zn

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