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Electro - Conductivity Chart
Electro - Conductivity (EC) or Conductivity Factor (cF) can be expressed as either millisiemens (mS), cF or parts per million (ppm).
Example: 1mS = 10cF = 700ppm
The pH and Electro - Conductivity values specified here are given as a broad range. It should be noted that different seasons and climate will alter the needs of your plant. As a general rule, in cooler grow rooms, the plant requires higher nutrients. With warmer rooms, the plant requires lower levels of nutrients.
Vegetable Crops
L = Low M = Medium H = High
|
|
Product
|
pH
|
Category
|
cF
|
ppm
|
|
Artichoke
|
6.5 - 7.5
|
L
|
8 - 18
|
560 - 1260
|
|
Asparagus
|
6.0 - 6.8
|
L
|
14 - 18
|
980 - 1260
|
|
Bean (Common)
|
6.0
|
H
|
20 - 40
|
1400 - 2800
|
|
Beetroot
|
6.0 - 6.5
|
H
|
18 - 50
|
1260 - 3500
|
|
Broad Bean
|
6.0 - 6.5
|
M
|
18 - 22
|
1260 - 1540
|
|
Broccoli
|
6.0 - 6.8
|
H
|
28 - 35
|
1960 - 2450
|
|
Brussels Sprout
|
6.5
|
H
|
25 - 30
|
1750 - 2100
|
|
Cabbage
|
6.5 - 7.0
|
H
|
25 - 30
|
1750 - 2100
|
|
Capsicum
|
6.0 - 6.5
|
M
|
18 - 22
|
1260 - 1540
|
|
Carrot
|
6.3
|
M
|
16 - 20
|
1120 - 1400
|
|
Cauliflower
|
6.5 - 7.0
|
M
|
15 - 20
|
1050 - 1400
|
|
Celery
|
6.5
|
M
|
18 - 24
|
1260 - 1680
|
|
Cucumber
|
5.5
|
M
|
17 - 25
|
1190 - 1750
|
|
Eggplant
|
6.0
|
H
|
25 - 35
|
1750 - 2450
|
|
Endive
|
5.5
|
M
|
20 - 24
|
1400 - 1680
|
|
Fodder
|
6.0
|
M
|
18 - 20
|
1260 - 1400
|
|
Garlic
|
6.0
|
L
|
14 - 18
|
980 - 1260
|
|
Leek
|
6.5 - 7.0
|
L
|
14 - 18
|
980 - 1260
|
|
Lettuce
|
6.0 - 7.0
|
L
|
8 - 12
|
560 - 840
|
|
Marrow
|
6.0
|
M
|
18 - 24
|
1260 - 1680
|
|
Okra
|
6.5
|
H
|
20 - 24
|
1400 - 1680
|
|
Onion
|
6.0 - 6.7
|
L
|
14 - 18
|
980 - 1260
|
|
Pak - choi
|
7.0
|
M
|
15 - 20
|
1050 - 1400
|
|
Parsnip
|
6.0
|
L
|
14 - 18
|
980 - 1260
|
|
Pea
|
6.0 - 7.0
|
L
|
8 - 18
|
980 - 1260
|
|
Pepino
|
6.0 - 6.5
|
H
|
20 - 50
|
1400 - 3500
|
|
Potato
|
5.0 - 6.0
|
H
|
20 - 25
|
1400 - 1750
|
|
Pumpkin
|
5.5 - 7.5
|
M
|
18 - 24
|
1260 - 1680
|
|
Radish
|
6.0 - 7.0
|
M
|
16 - 22
|
840 - 1540
|
|
Spinach
|
6.0 - 7.0
|
M
|
18 - 23
|
1260 - 1610
|
|
Silverbeet
|
6.0 - 7.0
|
M
|
18 - 23
|
1260 - 1610
|
|
Sweet Corn
|
6.0
|
M
|
16 - 24
|
840 - 1680
|
|
Sweet Potato
|
5.5 - 6.0
|
H
|
20 - 25
|
1400 - 1750
|
|
Taro
|
5.0 - 5.5
|
H
|
25 - 30
|
1750 - 2100
|
|
Tomato
|
6.0 - 6.5
|
H
|
20 - 50
|
1400 - 3500
|
|
Turnip
|
6.0 - 6.5
|
M
|
18 - 24
|
1260 - 1680
|
|
Zucchini
|
6.0
|
M
|
18 - 24
|
1260 - 1680
|
|
Product
|
pH
|
Category
|
cF
|
ppm
|
|
Basil
|
5.5 - 6.5
|
L
|
10 - 16
|
700 - 1120
|
|
Chicory
|
5.5 - 6.0
|
H
|
20 - 24
|
1400 - 1680
|
|
Chives
|
6.0 - 6.5
|
M
|
18 - 22
|
1260 - 1540
|
|
Fennel
|
6.4 - 6.8
|
L
|
10 - 14
|
700 - 980
|
|
Lavender
|
6.4 - 6.8
|
L
|
10 - 14
|
700 - 980
|
|
Lemon Balm
|
5.5 - 6.5
|
L
|
10 - 16
|
700 - 1120
|
|
Marjoram
|
6.0
|
M
|
16 - 20
|
1120 - 1400
|
|
Mint
|
5.5 - 6.0
|
H
|
20 - 24
|
1400 - 1680
|
|
Mustard Cress
|
6.0 - 6.5
|
M
|
12 - 24
|
840 - 1680
|
|
Parsley
|
5.5 - 6.0
|
L
|
8 - 18
|
560 - 1260
|
|
Rosemary
|
5.5 - 6.0
|
L
|
10 - 16
|
700 - 1120
|
|
Sage
|
5.5 - 6.5
|
L
|
10 - 16
|
700 - 1120
|
|
Thyme
|
5.5 - 7.0
|
L
|
8 - 16
|
560 - 1120
|
|
Watercress
|
6.5 - 6.8
|
L
|
4 - 18
|
280 - 1260
|
|
Product
|
pH
|
Category
|
cF
|
ppm
|
|
African Violet
|
6.0 - 7.0
|
L
|
12 - 15
|
840 - 1050
|
|
Anthuurium
|
5.0 - 6.0
|
M
|
16 - 20
|
1120 - 1400
|
|
Antirrhinim
|
6.5
|
M
|
16 - 20
|
1120 - 1400
|
|
Aphelandra
|
5.0 - 6.0
|
M
|
18 - 24
|
1260 - 1680
|
|
Aster
|
6.0 - 6.5
|
M
|
18 - 24
|
1260 -1680
|
|
Begonia
|
6.5
|
L
|
14 - 18
|
980 - 1260
|
|
Bromeliad
|
5.0 - 7.5
|
L
|
8 - 12
|
560 - 840
|
|
Caladium
|
6.0 - 7.5
|
M
|
16 - 20
|
1120 - 1400
|
|
Canna
|
6.0
|
M
|
18 - 24
|
1260 - 1680
|
|
Carnation
|
6.0
|
H
|
20 - 35
|
1260 - 2450
|
|
Chrysanthemum
|
6.0 - 6.2
|
H
|
18 - 25
|
1400 - 1750
|
|
Cymbidium
|
5.5
|
L
|
6 - 10
|
420 - 560
|
|
Dahlia
|
6.0 - 7.0
|
M
|
15 - 20
|
1050 - 1400
|
|
Dieffenbachia
|
5.0 - 6.0
|
H
|
18 - 24
|
1400 - 1680
|
|
Dracaena
|
5.0 - 6.0
|
H
|
18 - 24
|
1400 - 1680
|
|
Fern
|
6.0
|
M
|
16 - 20
|
1120 - 1400
|
|
Ficus
|
5.5 - 6.0
|
M
|
16 - 24
|
1120 - 1680
|
|
Freesia
|
6.5
|
M
|
10 - 20
|
700 - 1400
|
|
Impatien
|
5.5 - 6.5
|
M
|
18 - 20
|
1260 - 1400
|
|
Gerbera
|
5.0 - 6.5
|
H
|
20 - 25
|
1400 - 1750
|
|
Gladiolus
|
5.5 - 6.5
|
H
|
20 - 24
|
1400 - 1680
|
|
Monstera
|
5.0 - 6.0
|
H
|
18 - 24
|
1400 - 1680
|
|
Palm
|
6.0 - 7.5
|
M
|
16 - 20
|
1120 - 1400
|
|
Rose
|
5.5 - 6.0
|
M
|
15 - 25
|
1050 - 1750
|
|
Stock
|
6.0 - 7.0
|
M
|
16 - 20
|
1120 - 1400
|
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