Plants growing in planters rely on you to supply them with sufficient water as they are growing in a very limited amount of soil or compost - unlike plants grown in the ground which will have access to a greater area of moisture. However, you can make watering your planters simple and efficient by following a few simple guidelines.
When filling your patio planter with compost / soil always mix in some water absorbing crystals - such as Swell Gel - as these will soak up loads of water and slowly release it to the plants. We also recommend that you set up a simple drip irrigation kit to automatically supply your planters with water - depending on the size of the planter and the plants growing within it you will need about 3-4 drippers spaced around the planter to drip water directly onto the soil / compost. An irrigation system of this type will need to be attached to your mains water and can be controlled manually - by you turning your outside tap on and off - or automatically by fitting a water timer.