Herbs are among the easiest plants to start with in hydroponics. Basil, mint and parsley are three popular choices, and each behaves a little differently.
Basil
Basil grows quickly and likes plenty of light. Pinch off flower buds as they appear to keep the leaves coming. Harvest from the top of the plant, just above a pair of leaves, so it branches out.
Mint
Mint spreads vigorously, so give it its own container rather than sharing a system with slower herbs. Harvest regularly to keep it bushy.
Parsley
Parsley is slower to get going than basil or mint. Be patient with the first harvest, and cut the outer stems first so the centre keeps growing.
Harvesting tips
Cut herbs with clean scissors. Take only what you need, and never remove more than about a third of the plant at once.