Plant Electroconductivity Chart
This chart was created from various sources based on hydroponic growing. Some charts use conversion factor (cF), parts per million (ppm), and or Total Dissolved Solids (TDS). All of which are confusing and most likely unnecessary since they are multiples of EC anyway. I have not been able to find an academic source or a peer reviewed paper on the net to base this chart on yet. Probably time to go to the library. This is a working document.
- pH = Potential of Hydrogen
- EC = Electroconductivity = 1 milliSiemens per centimeter = 1mS/cm
Vegetables
| Plant |
pH |
EC
| grouping |
| Artichoke |
6.5 - 7.5 |
0.8 - 1.8 |
LOW |
| Asparagus |
6.0 - 6.8 |
1.4 - 1.8 |
LOW |
| Bean (Common) |
6.0 |
2.0 - 4.0 |
HIGH |
| Beetroot |
6.0 - 6.5 |
1.8 - 5.0 |
HIGH |
| Broad Bean |
6.0 - 6.5 |
1.8 - 2.2 |
MEDIUM |
| Broccoli |
6.0 - 6.8 |
2.8 - 3.5 |
HIGH |
| Brussels Sprout |
6.5 |
2.5 - 3.0 |
HIGH |
| Cabbage |
6.5 - 7.0 |
2.5 - 3.0 |
HIGH |
| Capsicum |
6.0 - 6.5 |
1.8 - 2.2 |
MEDIUM |
| Carrot |
6.3 |
1.6 - 2.0 |
MEDIUM |
| Cauliflower |
6.5 - 7.0 |
1.5 - 2.0 |
MEDIUM |
| Celery |
6.5 |
1.8 - 2.4 |
MEDIUM |
| Cucumber |
5.5 |
1.7 - 2.5 |
MEDIUM |
| Eggplant |
6.0 |
2.5 - 3.5 |
HIGH |
| Endive |
5.5 |
2.0 - 2.4 |
MEDIUM |
| Fodder |
6.0 |
1.8 - 2.0 |
MEDIUM |
| Garlic |
6.0 |
1.4 - 1.8 |
LOW |
| Leek |
6.5 - 7.0 |
1.4 - 1.8 |
LOW |
| Lettuce |
6.0 - 7.0 |
0.8 - 1.2 |
LOW |
| Marrow |
6.0 |
1.8 - 2.4 |
MEDIUM |
| Okra |
6.5 |
2.0 - 2.4 |
HIGH |
| Onion |
6.0 - 6.7 |
1.4 - 1.8 |
LOW |
| Pak choi |
7.0 |
1.5 - 2.0 |
MEDIUM |
| Parsnip |
6.0 |
1.4 - 1.8 |
LOW |
| Pea |
6.0 - 7.0 |
0.8 - 1.8 |
LOW |
| Pepino |
6.0 - 6.5 |
2.0 - 5.0 |
HIGH |
| Potato |
5.0 - 6.0 |
2.0 - 2.5 |
HIGH |
| Pumpkin |
5.5 - 7.5 |
1.8 - 2.4 |
MEDIUM |
| Radish |
6.0 - 7.0 |
1.6 - 2.2 |
MEDIUM |
| Spinach |
6.0 - 7.0 |
1.8 - 2.3 |
MEDIUM |
| Silverbeet |
6.0 - 7.0 |
1.8 - 2.3 |
MEDIUM |
| Sweet Corn |
6.0 |
1.6 - 2.4 |
MEDIUM |
| Sweet Potato |
5.5 - 6.0 |
2.0 - 2.5 |
HIGH |
| Taro |
5.0 - 5.5 |
2.5 - 3.0 |
HIGH |
| Tomato |
6.0 - 6.5 |
2.0 - 5.0 |
HIGH |
| Turnip |
6.0 - 6.5 |
1.8 - 2.4 |
MEDIUM |
| Zucchini |
6.0 |
1.8 - 2.4 |
MEDIUM |
Fruits
| Plant |
pH |
EC |
grouping |
| Banana |
5.5 - 6.5 |
1.8 - 2.2 |
MEDIUM |
| Black Currant |
6.0 |
1.4 - 1.8 |
LOW |
| Blueberry |
4.0 - 5.0 |
1.8 - 2.0 |
MEDIUM |
| Melon |
5.5 - 6.0 |
2.0 - 2.5 |
HIGH |
| Passionfruit |
6.5 |
1.6 - 2.4 |
MEDIUM |
| Paw-Paw |
6.5 |
2.0 - 2.4 |
HIGH |
| Pineapple |
5.5 - 6.0 |
2.0 - 2.4 |
HIGH |
| Red Currant |
6.0 |
1.4 - 1.8 |
MEDIUM |
| Rhubarb |
5.0 - 6.0 |
1.6 - 2.0 |
MEDIUM |
| Strawberries |
6.0 |
1.8 - 2.2 |
MEDIUM |
| Watermelon |
5.8 |
1.5 - 2.4 |
MEDIUM |
Herbs
| Plant |
pH |
EC |
grouping |
| Basil |
5.5 - 6.5 |
1.0 - 1.6 |
LOW |
| Chicory |
5.5 - 6.0 |
2.0 - 2.4 |
HIGH |
| Chives |
6.0 - 6.5 |
1.8 - 2.2 |
MEDIUM |
| Fennel |
6.4 - 6.8 |
1.0 - 1.4 |
LOW |
| Lavender |
6.4 - 6.8 |
1.0 - 1.4 |
LOW |
| Lemon Balm |
5.5 - 6.5 |
1.0 - 1.6 |
LOW |
| Marjoram |
6.0 |
1.6 - 2.0 |
MEDIUM |
| Mint |
5.5 - 6.0 |
2.0 - 2.4 |
HIGH |
| Mustard Cress |
6.0 - 6.5 |
1.2 - 2.4 |
MEDIUM |
| Parsley |
5.5 - 6.0 |
0.8 - 1.8 |
LOW |
| Rosemary |
5.5 - 6.0 |
1.0 - 1.6 |
LOW |
| Sage |
5.5 - 6.5 |
1.0 - 1.6 |
LOW |
| Thyme |
5.5 - 7.0 |
0.8 - 1.6 |
LOW |
| Watercress |
6.5 - 6.8 |
0.4 - 1.8 |
LOW |
Flowers
| Plant |
pH |
EC |
grouping |
| African Violet |
6.0 - 7.0 |
1.2 - 1.5 |
LOW |
| Anthuurium |
5.0 - 6.0 |
1.6 - 2.0 |
MEDIUM |
| Antirrhinim |
6.5 |
1.6 - 2.0 |
MEDIUM |
| Aphelandra |
5.0 - 6.0 |
1.8 - 2.4 |
MEDIUM |
| Aster |
6.0 - 6.5 |
1.8 - 2.4 |
MEDIUM |
| Begonia |
6.5 |
1.4 - 1.8 |
LOW |
| Bromeliad |
5.0 - 7.5 |
0.8 - 1.2 |
LOW |
| Caladium |
6.0 - 7.5 |
1.6 - 2.0 |
MEDIUM |
| Canna |
6.0 |
1.8 - 2.4 |
MEDIUM |
| Carnation |
6.0 |
2.0 - 3.5 |
HIGH |
| Chrysanthemum |
6.0 - 6.2 |
1.8 - 2.5 |
HIGH |
| Cymbidium |
5.5 |
0.6 - 1.0 |
LOW |
| Dahlia |
6.0 - 7.0 |
1.5 - 2.0 |
MEDIUM |
| Dieffenbachia |
5.0 - 6.0 |
1.8 - 2.4 |
HIGH |
| Dracaena |
5.0 - 6.0 |
1.8 - 2.4 |
HIGH |
| Fern |
6.0 |
1.6 - 2.0 |
MEDIUM |
| Ficus |
5.5 - 6.0 |
1.6 - 2.4 |
MEDIUM |
| Freesia |
6.5 |
1.0 - 2.0 |
MEDIUM |
| Impatien |
5.5 - 6.5 |
1.8 - 2.0 |
MEDIUM |
| Gerbera |
5.0 - 6.5 |
2.0 - 2.5 |
HIGH |
| Gladiolus |
5.5 - 6.5 |
2.0 - 2.4 |
HIGH |
| Monstera |
5.0 - 6.0 |
1.8 - 2.4 |
HIGH |
| Palm |
6.0 - 7.5 |
1.6 - 2.0 |
MEDIUM |
| Rose |
5.5 - 6.0 |
1.5 - 2.5 |
MEDIUM |
| Stock |
6.0 - 7.0 |
1.6 - 2.0 |
MEDIUM |