The species of plants you can grow only in water, without any soil base, is truly amazing. So, if you are ready for a shift from the conventional gardening to this water gardening, start now.
Indeed, why not grow your favorite “go-to” herbs in water and keep them close at hand? Water-born herbs grow full of flavor just as those you grow outdoors in the garden. The advantage here is that you don’t have to mess up with soil, or worry about regular plant watering, or changing weather seasons.
While most herbs will be happy growing in water, only those raised from cuttings are easier to start in water. The cilantro, mustard and dill are a bit tricky though because you need to sow the seeds in soil, or another proxy medium, and then do the transfer of the seedlings to water.
Do not hesitate: soil-to-water transition is not impossible! It may not always come successful because soil-grown roots are a bit different from those water-grown.
This is what you need to grow herbs in water
You can root herb cuttings in glass bottles filled with plain water and place them on your kitchen sill. Tap water (left to air overnight) is fine, and so is stored rainwater. The best is spring or well water – it has some amount of dissolved minerals that are quickly absorbed by the plants.
Note: Avoid using chlorinated water with fragile plants as the bleaching chemical is not exactly friendly to plant tissues.