The four types of raised beds are framed, mounded, elevated, and terraced. Each type fits a different yard, budget, and body. Picking the right raised bed styles from the very start saves you money and effort down the road.
Framed beds are the most common type and what most people picture first. They use sides made of wood, metal, or stone to hold the soil in place. UGA Extension lists standard framed beds at 6-8 inches (15.2-20.3 centimeters) tall. Many gardeners build them up to 12 inches (30.5 centimeters) for deeper root crops like carrots and parsnips. Cedar and redwood frames last the longest without any chemical treatment needed at all.
I started with framed cedar beds seven years ago and they still look solid today. No rot, no warping, and the wood has aged to a nice gray color. In my experience, spending more on cedar up front saves you from having to rebuild pine frames every three or four years.
Mounded beds cost almost nothing to build. You just heap soil and compost into long flat-topped rows about 6-8 inches (15.2-20.3 centimeters) above the ground. No frame, no lumber, no screws, and no hardware needed at all. Rain washes soil off the sides over time so you need to reshape them each season. They work great as a cheap starting point to test whether raised bed growing suits you before you spend money on frames and fill.
An elevated raised bed sits on legs at table or waist height. UMN Extension says a height of 27 inches (68.6 centimeters) works for people in a wheelchair. These beds also keep plants safe from rabbits and ground pests. The tradeoff is less soil volume than ground-level beds. Less soil means faster drying and shorter root room for plants.
I built an elevated bed for my mother-in-law who has bad knees. She went from not being able to garden at all to growing her own herbs and salad greens every week. Plan on watering every day in warm weather with this style since the small soil volume dries out fast in the sun and wind.
Terraced beds turn sloped yards into flat growing space. They step down a hillside like a staircase with each level held in place by stone, timber, or block walls. These beds stop erosion on grades where flat beds would wash out. They take the most labor to build but turn wasted hillsides into some of the most striking garden spaces you'll find. Water flows down from one tier to the next, so the top beds dry out first while the bottom beds stay wet the longest.
Match your bed type to your terrain and your needs. Flat yard with good access? Framed beds give you the best long-term value. Tight budget? Mounded beds get you growing for almost free. Bad knees or a wheelchair? An elevated bed puts your garden at a good working height.
Sloped yard? Terraced beds are your best bet for stable, level growing space. You can also mix types of raised beds in the same yard. I have framed beds for my main crops, an elevated bed near the kitchen door for herbs, and mounded rows in the back for overflow squash. Using more than one style lets you solve different problems across your yard. No single bed type has to do it all. Pick what works for each spot and you'll get much better results from every corner of your garden space.
Read the full article: Raised Beds: A Complete Growing Guide
