Raised beds are commonly used by gardeners to create a larger space in which plants can grow, thus leading to a greater yield. A raised bed is simply a way of framing the soil (usually with wood, stone or brick), creating more space for your plants to grow and more surface area in which to put seeds and starts; utilizing a limited space. Industrial agriculture uses straight lines and rows because this allows machines to do all of the cultivation and harvesting. But when you have only a small space to grow produce, as most city dwellers do, it makes sense to put plants close together. With this method, as vegetables grow their leaves create a dense canopy over the soil blocking light from reaching weed seeds. It also reduces the amount of water lost to evaporation, though you will still need irrigation of some kind.
-More space for your vegetables to grow when space is limited
-Healthier plants and fewer weeds
If you have some sun but don’t have much of a yard or it happens to be incased in concrete the best option might be to use containers. When possible we use recycled wood or previously used pots to keep the cost down. Containers for planting can be made out of recycled wood (no pressure treated lumber), cinder blocks, bricks, rocks, terracotta pots, and plastic pots or bins. Growing in containers requires regular water and feeding because the plant doesn’t have the ability to grow extensive roots, limiting its ability to find nutrients and water. Some vegetables with deep root systems (beets and carrots) will not do well in containers, but many dwarf fruit trees will flourish.
-Containers are moveable
-Grow food where there is no permeable soil