- 19 Jun 2012
You can make a container to sit your grow bags on.
It is possible to buy them (they're quite cheap here in Denmark, but I gather they're more expensive in the UK).
There was an artical in Gardener's World mag a few months ago, showing how to make them.
You need a plastic box with a lid about the same size as a growbag, a couple of 2liter pop bottles, two plastic plant pots.
Cut the edge off the lid, so that it's small enough to sit in the box, about half way up. Cut two holes in the lid, slightly smaller than the diameter of the plant pots. The plant pots are attatched to the underneath of the lid with wire. Another hole is cut in the corner of the lid, the same diameter as the pop bottles. Cut the top and bottom off the bottles and fit one inside the other to make a pipe. This is where you add the water. Put the lid in the box, and fill the plant pots with soil. Cut two flaps on the underside of the growbag, that line up with the soil in the plant pots. The soil will soak up the water and capillery action will take it up to the plants. Take care not to overfill, as the plants don't want to sit in water. Usually you'd put the growbags on the watering box, and then plant up, but if you're careful then it may be possible to do it after planting.
We've made a variation on this for our pots with summer flowers in. We've used containers with lids, that are small enough to fit in the bottom of the pot. Then we've cut slits in the lid, and threaded capillery matting though, so that it hangs down in to the container but also has a good surface area on the top of the lid. To fill them up we've added a tube. The soil is in contact with the capillery matting. So far they seem to be doing the trick. In fact my home made ones are doing better than some shop bourght ones!