Plant nutrient requirements
To use the table below, simply search for the plant you're trying to grow and read across to determine the ideal pH and electrical conductivity range for the plant to be in for optimum growth!
Note: PPM is calculated as EC x 700.
| Plant name | Plant type | pH range | EC range | PPM range |
|---|---|---|---|---|
| African Violets | Flower | 6.0-7.0 | 1.2-1.5 | 840-1050 |
| Antirrhinum | Houseplant | 6.5 | 1.6-2.0 | 1120-1400 |
| Aphelandra | Houseplant | 5.0-6.0 | 1.8-2.4 | 1260-1680 |
| Artichoke | Vegetable | 6.5-7.5 | 0.8-1.8 | 560-1260 |
| Asparagus | Vegetable | 6.0-6.8 | 1.4-1.8 | 980-1260 |
| Banana | Fruit | 5.5-6.5 | 1.8-2.2 | 1260-1540 |
| Basil | Herb | 5.5-6.5 | 1.0-1.6 | 700-1120 |
| Bean (Common) | Vegetable | 6.0-6.5 | 1.8-2.4 | 1260-1680 |
| Beetroot | Root Vegetable | 6.0-6.5 | 0.8-5.0 | 560-3500 |
| Begonia | Houseplant | 6.5 | 1.4-2.4 | 980-1680 |
| Broccoli | Vegetable | 6.0-6.5 | 2.8-3.5 | 1960-2450 |
| Brussels Sprouts | Vegetable | 6.5-7.5 | 2.5-3.0 | 1750-2100 |
| Cabbage | Vegetable | 6.5-7.0 | 2.5-3.0 | 1750-2100 |
| Capsicums | Vegetable | 6.0-6.5 | 1.8-2.8 | 1260-1960 |
| Carrots | Vegetable | 6.3 | 1.6-2.0 | 1120-1400 |
| Cauliflower | Vegetable | 6.0-7.0 | 0.5-2.0 | 350-1400 |
| Celery | Vegetable | 6.5 | 1.8-2.4 | 1260-1680 |
| Chicory | Vegetable | 5.5-6.0 | 2.0-2.4 | 1400-1680 |
| Chives | Herb | 6.0-6.5 | 1.8-2.4 | 1260-1680 |
| Chrysanthemum | Flower | 6.0-6.2 | 1.8-2.5 | 1260-1750 |
| Cucumber | Vegetable | 5.8-6.0 | 1.7-2.5 | 1190-1750 |
| Eggplant | Vegetable | 5.5-6.5 | 2.5-3.5 | 1750-2450 |
| Fennel | Herb | 6.4-6.8 | 1.0-1.4 | 700-980 |
| Ficus | Houseplant | 5.5-6.0 | 1.6-2.4 | 1120-1680 |
| Garlic | Root Vegetable | 6 | 1.4-1.8 | 980-1260 |
| Hot Peppers | Vegetable | 6.0-6.5 | 1.8-2.8 | 1260-1960 |
| Kale | Vegetable | 6.0-7.5 | 1.6-2.5 | 1120-1750 |
| Kohlrabi | Vegetable | 6.0-7.5 | n/a | n/a |
| Lavender | Flower | 6.4-6.8 | 1.0-1.4 | 700-980 |
| Leek | Vegetable | 6.5-7.0 | 1.4-1.8 | 980-1260 |
| Lemon Balm | Herb | 5.5-6.5 | 1.0-1.6 | 700-1120 |
| Lettuce | Vegetable | 5.5-6.5 | 0.8-1.2 | 560-840 |
| Marjoram | Herb | 6 | 1.6-2.0 | 1120-1400 |
| Melon | Fruit | 5.5-6.0 | 2.0-2.5 | 1400-1750 |
| Mint | Herb | 5.5-6.0 | 2.0-2.4 | 1400-1680 |
| Monstera | Houseplant | 5.0-6.0 | 1.8-2.4 | 1260-1680 |
| Mustard Cress | Vegetable | 6.0-6.5 | 1.2-2.4 | 840-1680 |
| Okra | Vegetable | 6.5 | 2.0-2.4 | 1400-1680 |
| Onions | Root Vegetable | 6.0-6.7 | 1.4-1.8 | 980-1260 |
| Pak-choi | Vegetable | 7 | 1.5-2.0 | 1050-1400 |
| Parsley | Herb | 5.5-6.0 | 0.8-1.8 | 560-1260 |
| Parsnip | Root Vegetable | 6 | 1.4-1.8 | 980-1260 |
| Paw-Paw | Fruit | 6.5 | 2.0-2.4 | 1400-1680 |
| Pea | Vegetable | 6.0-7.0 | 0.8-1.8 | 560-1260 |
| Peppers | Vegetable | 5.8-6.3 | 1.8-2.8 | 1260-1960 |
| Pineapple | Fruit | 5.5-6.0 | 2.0-2.4 | 1400-1680 |
| Potato | Vegetable | 5.0-6.0 | 2.0-2.5 | 1400-1750 |
| Pumpkin | Vegetable | 5.5-7.5 | 1.8-2.4 | 1260-1680 |
| Radish | Vegetable | 6.0-7.0 | 1.6-2.2 | 1120-1540 |
| Rhubarb | Vegetable | 5.0-6.0 | 1.6-2.0 | 1120-1400 |
| Rosemary | Herb | 5.5-6.0 | 1.0-1.6 | 700-1120 |
| Roses | Flower | 5.5-6.0 | 1.5-2.5 | 1050-1750 |
| Sage | Herb | 5.5-6.5 | 1.0-1.6 | 700-1120 |
| Silverbeet | Vegetable | 6.0-7.0 | 1.8-2.3 | 1260-1610 |
| Spinach | Vegetable | 5.5-6.6 | 1.8-2.3 | 1260-1610 |
| Squash | Vegetable | 5.0-6.5 | 1.8-2.4 | 1260-1680 |
| Strawberries | Berry | 5.5-6.5 | 1.8-2.2 | 1260-1540 |
| Sweet Corn | Vegetable | 6 | 1.6-2.4 | 1120-1680 |
| Sweet Potato | Vegetable | 5.5-6.0 | 2.0-2.5 | 1400-1750 |
| Swiss Chard | Vegetable | 6.0-6.5 | 1.8-2.3 | 1260-1610 |
| Thyme | Herb | 5.5-7.0 | 0.8-1.6 | 560-1120 |
| Tomato | Vegetable | 5.5-6.5 | 2.0-5.0 | 1400-3500 |
| Turnip | Root Vegetable | 6.0-6.5 | 1.8-2.4 | 1260-1680 |
| Watercress | Herb | 6.5-6.8 | 0.4-1.8 | 280-1260 |
| Watermelon | Fruit | 5.8 | 1.5-2.4 | 1050-1680 |
| Zucchini | Vegetable | 6 | 1.8-2.4 | 1260-1680 |