My son built me raised beds with reclaimed stone and bricks, they are just over 3ft high, and they are super, no more bending and stooping, I ordered 1 ton of top soil and spent a whole day shifting it by muck-bucket, it was very hard work and I sat down after every 10 buckets, but very satisfying and best of all the plants love it, they can grow lovely deep roots, and I don't need to water so often, also all the flowers are at eye level, which is lovely, last year I grew Cosmos and it reached up to the roof of the conservatory, and they were full of lovely Bees, I have never regretted having raised beds,