Overview:
– Raised beds support complex agriculture systems like permaculture
– Control erosion, recycle water, and conserve nutrients
– Built along contour lines on slopes to maximize space for crop production
– Compatible with square foot gardening and companion planting
– Keyhole gardens use circular beds with a central path for water distribution
Materials and Construction:
– Lumber is common for raised bed construction
– Use plastic liner with CCA-treated lumber for growing edibles
– Railroad ties or concrete blocks are alternative materials
– Prefab solutions made from UV-stabilized polyethylene available
– Clear plastic covers can protect crops from weather
Benefits:
– Extends planting season and reduces weeds
– Improves soil quality and reduces need for poor native soil
– Prevents soil compaction and facilitates root growth
– Waist-high beds enable easy access for elderly and disabled
– Ideal for dry climates and areas with poor soil quality
Gallery:
– Various examples of raised bed gardens worldwide
– Different designs with lettuce, herbs, flowers, and vegetables
– Adapted raised beds for wheelchair gardening
– Utilization of natural stones and wooden edgings
– Community allotment gardens with raised beds for accessibility
Sunken Gardens:
– Waffle garden method by Zuni people in arid climates
– Clay walls surround planting area and act as water reservoir
– Traditional English sunken gardens are formal and terraced
– Lower garden level with steps leading down
– Contrasts raised bed gardening with different design and irrigation methods
Raised-bed gardening is a form of gardening in which the soil is raised above ground level and usually enclosed in some way. Raised bed structures can be made of wood, rock, concrete or other materials, and can be of any size or shape. The soil is usually enriched with compost.
Vegetables are grown in geometric patterns, much closer together than in conventional row gardening. The spacing is such that when the vegetables are fully grown, their leaves just barely touch each other, creating a microclimate in which weed growth is suppressed and moisture is conserved.