See the Nutrient FAQ's for help with the chart.
The pH and electro-conductivity values specified here are given as a range. It should be noted that specific plant requirements will vary according to climatic conditions, and from season to season within that region.
For easy growing reference, plants that share abroad range groupings of low, medium, high can be grown together using the name nutrient electro-conductivity, proving a middle ground cF is adopted.
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
|
| Banana |
5.5-6.5 |
M |
18-22 |
1260-1540 |
| Black Currant |
6.0 |
L |
14-18 |
980-1260 |
| Blueberry |
4.0 -5.0 |
M |
18-20 |
1260-1400 |
| Melon |
5.5-6.0 |
H |
20-25 |
1400-1750 |
| Passionfruit |
6.5 |
M |
16-24 |
840-1680 |
| Paw-Paw |
6.5 |
H |
20-24 |
1400-1680 |
| Pineapple |
5.5-6.0 |
H |
20-24 |
1400-1680 |
| Red Currant |
6.0 |
M |
14-18 |
980-1260 |
| Rhubarb |
5.0- 6.0 |
M |
16-20 |
840-1400 |
| Strawberries |
6.0 |
M |
18-22 |
1260-1540 |
| Watermelon |
5.8 |
M |
15-24 |
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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