December 18, 2019 2 min read
Hydroponic plants grow faster than soil-grown plants because it is easy to optimise their conditions, so they can reach their full potential. To grow quickly, aim to hit these conditions as closely as you can.
A temperature between 23 and 27 degrees is optimal for most plants. Plants thrive in consistent, mild temperatures, although an occasional hot or cold day will not kill them.
Every plant is different, but 50 to 60% humidity is a general rule of thumb for good growth.
If humidity is too high, plants cannot transpire, which means releasing water through their leaves into the atmosphere. If they cannot transpire, the flow of water through the plant stops and the plant can rot from the inside out.
If it is too dry, plants release all their water into the air and use water very quickly.
A little moisture in the air lets plants focus their energy on growth, so keep them in a slightly humid environment, but not so humid that they cannot transpire.
Without light a plant cannot photosynthesise, the process it uses to feed itself, so make sure it gets enough of the right light. Each plant is different, so research what yours like best and adjust where they sit or their light cycle if you use a grow light. See how much light plants need.
Just like people, plants need nutrients to grow. These include the three macronutrients nitrogen, phosphorus and potassium (NPK) and a range of micronutrients such as boron (B), copper (Cu) and calcium (Ca). Learn more in what nutrients do plants need, and shop hydroponic nutrients.
There is always a little trial and error involved. If it does not work the first time, try again. If you are having trouble, get in touch and we will help.
Pair a grow light with the right nutrients for the fastest growth.
Written by the gathera team. Last reviewed October 2026.
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