Nutrient Solution EC and pH Parameters for Hydroponic Herbs
The ranges shown below are to be used as guidelines only. Keep in mind that different plant varieties may require adjustments to nutrient levels or pH to achieve maximum yields.
Recommended Nutrient Solution Parameters for Hydroponic Plants
The ranges shown below are to be used as guidelines only. Keep in mind that different plant varieties may require adjustments to nutrient levels or pH to achieve maximum yields.
Also, as a general rule plants require more nutrients in cooler weather and less nutrients in hotter weather. In Winter, raise the nutrient levels. In Summer, lower the nutrient levels.
Herbs
| Plants | pH | cF | EC | PPM |
| Basil | 5.5~6.5 | 10~16 | 1.0~1.6 | 700~1120 |
| Chicory | 5.5~60 | 20~24 | 2.0~2.4 | 1400~1600 |
| Chives | 6.0~6.5 | 18~22 | 1.8~2.4 | 1260~1540 |
| Fennel | 6.4~6.8 | 10~14 | 1.0~1.4 | 700~980 |
| Lavender | 6.4~6.8 | 10~14 | 1.0~1.4 | 700~980 |
| Lemon Balm | 5.5~6.5 | 10~16 | 1.0~1.6 | 700~1120 |
| Marjoram | 6.0 | 16~20 | 1.6~2.0 | 1120~1400 |
| Mint | 5.5~6.0 | 20~24 | 2.0~2.4 | 1400~1680 |
| Mustard Cress | 6.0~6.5 | 12~24 | 1.2~2.4 | 840~1680 |
| Parsley | 5.5~6.0 | 8~18 | 0.8~1.8 | 560~1260 |
| Rosemary | 5.5~6.0 | 10~16 | 1.0~1.6 | 700~1120 |
| Sage | 5.5~6.5 | 10~16 | 1.0~ | 700~1120 |
| Thyme | 5.5~7.0 | 8~16 | 0.8~1.6 | 560~1120 |
| Watercress | 6.5~6.8 | 4~18 | 0.4~1.8 | 280~1260 |
Common Food Crops
| Plants | pH | cF | EC | PPM |
| Ambra Radicchio | 5.5~6.5 | |||
| Artichoke | 6.5~7.5 | 8~18 | 0.8~1.8 | 560~1260 |
| Asparagus | 6.0~6.8 | 14~18 | 1.4~1.8 | 980~1260 |
| Bean (Common) | 6.0 | 20~40 | 2~4 | 1400~2800 |
| Beans (Italian Bush) | 6.0 | |||
| Beans (Lima) | 6.0 | |||
| Beans (Pole) | 6.0 | |||
| Beetroot | 6.0 | 8~50 | 0.8~5 | 1260~3500 |
| Broad Bean | 6.0 | 18~22 | 1.8~2.2 | 1260~1540 |
| Broccoli | 6.0 | 28~435 | 2.8~3.5 | 1960~2450 |
| Brussell Sprout | 6.0 | 25~30 | 2.5~3.0 | 1750~2100 |
| Cabbage | 6.0 | 18~22 | 2.5~3.0 | 1750~2100 |
| Capsicum | 6.0 | 18~22 | 1.8~2.2 | 1260~1540 |
| Carrots | 6.0 | 16~20 | 1.6~2.0 | 1120~1400 |
| Cailiflower | 6.0 | 5~20 | 0.5~2.0 | 1050~1400 |
| Celery | 6.0 | 18~24 | 1.8~2.4 | 1260~1680 |
| Collard Greens | 6.0 | |||
| Cucumber | 6.0 | 17~25 | 1.7~2.5 | 1190~1750 |
| Eggplant | 6.0 | 25~35 | 2.5~3.5 | 1750~2450 |
| Endive | 6.0 | 20~24 | 2.0~2.4 | 1400~1680 |
| Fodder | 6.0 | 18~20 | 1.8~2.0 | 1260~1400 |
| Garlic | 6.0 | 14~18 | 1.4~1.8 | 980~1260 |
| Leek | 6.0 | 14~18 | 1.4~1.8 | 980~1260 |
| Lettuce | 6.0 | 20~40 | 0.8~1.8 | 560~840 |
| Marrow | 6.0 | 18~24 | 1.8~2.4 | 1260~1680 |
| Okra | 6.0 | 20~24 | 2.0~2.4 | 1400~1680 |
| Onions | 6.0 | 14~18 | 1.4~1.8 | 980~1260 |
| Bak~Choi | 6.0 | 15~20 | 1.5~2.0 | 1050~1400 |
| Parsnip | 6.0 | 14~18 | 1.4~1.8 | 980~1260 |
| Pea | 6.0 | 08~18 | 0.8~1.8 | 980~1260 |
| Peas (Sugar) | 6.0 | |||
| Pepino | 6.0 | 20~50 | 2.0~5.0 | 1400~3500 |
| Peppers | 6.0 | 20~30 | 2.0~3.0 | 1400~2100 |
| Bell Peppers | 6.0 | 20~25 | 2.0~2.5 | 1400~1750 |
| Hot Peppers | 6.0 | 20~35 | 3.0~3.5 | 2100~2450 |
| Potato | 6.0 | 20~25 | 2.0~2.5 | 1400~1750 |
| Pumpkin | 6.0 | 18~24 | 1.8~2.4 | 1260~1680 |
| Radish | 6.0 | 16~22 | 1.6~2.2 | 840~1540 |
| Spinach | 6.0 | 18~23 | 1.8~2.3 | 1260~1610 |
| Silverbeet | 6.0 | 18~23 | 1.8~2.3 | 1260~1610 |
| Sweet Corn | 6.0 | 16~24 | 1.6~2.4 | 840~1680 |
| Sweet Potato | 6.0 | 20~25 | 2.0~2.5 | 1400~1750 |
| Swiss Chard | 6.0 | |||
| Squash (Summer) | 6.0 | |||
| Squash (Winter) | 6.0 | |||
| Taro | 6.0 | 25~30 | 2.5~3.0 | 1750~2100 |
| Tomato | 6.0 | 20~50 | 2.0~5.0 | 1400~3500 |
| Turnip | 6.0 | 18~24 | 1.8~2.4 | 1260~1680 |
| Zucchini | 6.0 | 18~24 | 1.8~2.4 | 1260~1680 |