Compost is made from decomposing plants and is the most important addition to your trolley when you buy plants. It can also be added to garden beds in bulk at least once a year. A famous horticulturist once said that the three most important elements in gardening are 1. compost, 2. compost and you can probably guess that number 3 was – also compost. This makes one realise how important compost is in successful gardening as a soil amendment.