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Nutrient Calculator

GreenPlanet Nutrient Calculator

Using our Nutrient
Calculator is Simple

The water type will affect the amount of base nutrients that are required. When using RO (Reverse Osmosis) water or rain water, it is recommended to include ProCal in your nutrient program. If you are using water other than RO or Rain Water, choose Your Water below, and then measure the EC of of your water supply and enter it in.
HPSLEDLED/CO2Custom
When using high PPFD LED lighting with CO2 enrichment, nutrient strength may be increased by up to 30%. Or choose Custom to set your own target EC. Extreme caution should be taken when running high EC nutrients.
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2 Part Nutrient System
Week
Base Nutrient
Dual Fuel 1
Dual Fuel 2
Strength
EC

3 Part Nutrient System
Week
Base Nutrient
Grow
Bloom
Micro
Strength
EC

Backcountry BlendBackcountry Blend GrowBackcountry Blend BloomBackcountry Blend Boost
Vegetative StageWeek 1
Week 2
Week 3
Week 4
Week 5
Week 6
Flowering StageWeek 1
Week 2
Week 3
Week 4
Week 5
Week 6
Week 7
Week 8
Flush 1
Flush 2

Effect of Water Temperature
on Electrical Conductivity

Useful Conversions

Measures
 

Useful Conversions
1 tsp
5 mL
1 tbsp
15 mL
1 oz
30 mL
1 qt
946 mL
1 L
1000 mL
1 gal (US)
3.875 L
1 gal (US)
128 oz
1 gal (AU)
4.546 L

EC Conversion Chart

EC
mS/cm		 CF ppm 500
TDS		 ppm 700
(ECx700)
0.2
2
100
140
0.4
4
200
280
0.6
6
300
420
0.8
8
400
560
1
10
500
700
1.2
12
600
840
1.4
14
700
980
1.6
16
800
1120
1.8
18
900
1260
2
20
1000
1400
2.2
22
1100
1540
2.4
24
1200
1680
2.6
26
1300
1820
2.8
28
1400
1960
3
30
1500
2100
3.2
32
1600
2240
3.4
34
1700
2380
3.6
36
1800
2520

01

Select your Feed Program

02

Enter the volume of your feed tank in Litres

03

Select Plant Life Cycle

04

Select Water Supply

05

Select Your Water in not using RO or rainwater

06

Measure and enter the EC of your water supply

07

Select Growing Medium

08

Select your choice of Bloom Enhancer

09

Select HPS, LED, LED/CO2, or Custom to manually adjust the target EC

10

Follow our recommendations to acheive the target EC

  • Electrical Conductivity (EC) is used in this calculator. See TDS/PPM conversion table below.
  • Plant Guard (Potassium Silicate) must be added to the nutrient feed tank first. Allow to diffuse before adding any other nutrients or additives.
  • Target EC has been calculated using RO water at 18° C. Tap water quality can vary and will raise the stated EC. The nutrient calculator will adjust the base nutrient values accordingly.
  • High intensity LED and/or CO2 environments can use up to 30% higher EC. High EC nutrients must be used with extreme caution.
  • Always maintain nutrient solution pH between 5.8 – 6.3 and temperature between 18 – 22° C.
  • Ensure a minimum 10% nutrient runoff for run to waste systems.
  • Measure EC of nutrient runoff. If the EC is 0.4 higher than recommended, either add water to the feed tank or flush the medium with a 1/3 strength, pH adjusted nutrient solution.
  • For plants grown in Coconut Coir adding ProCal to this feed program is highly recommended. Use at 1.25 mL/L.
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