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Water pumps come in many sizes and designs, but the key question is how much water must reach its destination at the required lift height. A large flow figure on the box does not, by itself, tell you whether a pump suits your system....
Some time ago I was deep in research—on YouTube—when I found a video of hydroponics without a pump. My first thought was that it could not possibly work. Surely someone was trying to fool people. But I watched the whole video, then...
You cannot always see what is happening inside a pot. Roots support the plant and supply it with water and nutrients, but they themselves need air, moisture and a suitable temperature. When growth stalls, looking only at the leaves is not...
People often ask me what is good to grow indoors. I usually answer with another question: What would you eat? Growing something that regularly ends up on your plate is much more fun than choosing a plant just because it fits on the...
There can be plenty of nutrients in the pot or tank, yet the plant may still struggle to access them. Acidity may be one reason. It affects whether the roots can take up nutrients, even when those nutrients are present. That is why adding...
You don’t need to buy a special grow light to get started. An ordinary white LED bulb or fluorescent tube can work well, as long as enough light reaches the plant. That matters more than what the box says. Plants use light to make sugars...
Plants need the right nutrients in the right balance to develop roots, leaves, flowers, seeds and a crop. Fertiliser can make up for what is missing, but more is not always better. Too much of one element can damage roots or make it...
It is hard to call stone wool soil. I therefore prefer the term growing medium for the different materials in which plant roots grow. Soil, coir, clay pebbles and pumice can all do the job, although their properties vary considerably. The...
You may come across two different figures for phosphorus on the same fertiliser bag. One might say 20% and the other 8.72%. It may look as though something does not add up, but both can be right. The same amount is simply being expressed...
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