It’s important to measure the pH of your hydroponic garden on a regular basis. Plants are not able to take in nutrients when your nutrient water falls out of a certain pH level. Most plants prefer a pH level that is slightly acidic, around 5.0 to 6.5. To get the most out of your plants its best to tailor the pH to the plant your growing.
Recommended pH Level By Plant
| Fruit Crop | pH | Vegetable Crop | pH | |
| Apple | 5.0-6.5 | Asparagus | 6.0-7.0 | |
| Banana | 5.5-6.5 | Basil | 5.5-6.5 | |
| Blackberry | 5.5-6.5 | Beans | 6 | |
| Blueberry | 4.0-5.0 | Broccoli | 6.0-6.5 | |
| Cantaloupe | 6 | Cabbage | 6.5-7.0 | |
| Cherry | 6.0-7.5 | Carrots | 6.3 | |
| Grape | 6.0-7.5 | Cauliflower | 6.0-7.0 | |
| Mango | 5.5-6.5 | Celery | 6.5 | |
| Melon | 5.5-6.0 | Chives | 6.0-7.0 | |
| Peach | 6.0-7.5 | Cucumber | 5.5-6.0 | |
| Pineapple | 5.5-6.0 | Eggplant | 5.5-6.5 | |
| Plum | 6.0-7.5 | Fodder | 6 | |
| Raspberries | 5.8-6.5 | Garlic | 6 | |
| Strawberries | 5.5-6.5 | Kale | 6.0-7.5 | |
| Watermelon | 5.5-6.0 | Lettuce | 5.5-6.5 | |
| Mint | 6.0-7.0 | |||
| Onions | 6.0-6.7 | |||
| Pea | 6.0-7.0 | |||
| Peppermint | 6.0-7.0 | |||
| Peppers | 5.5-6.5 | |||
| Potato | 5.0-6.0 | |||
| Pumpkin | 5.5-7.5 | |||
| Spinach | 5.5-6.5 | |||
| Squash | 5.0-6.5 | |||
| Tomato | 5.5-6.5 | |||
| Zucchini | 6.0 |
If you discover your pH level is our of range then you should correct it immediately. Adjusting pH is an easy fix.
June 16, 2020 at 12:54 pm
Very clear explanations. Thanks
August 1, 2020 at 11:12 am
Thanks for the feedback Jose!
January 6, 2024 at 2:19 am
Thank you very much for the info, it’s my very first day growing with a hydroponic system. Wanted my little babies to be happy and well fed :]
January 7, 2024 at 11:01 am
Thanks for the feedback! I’m glad you found the information helpful!