When it comes to a raised planter box, what you put on the bottom can be just as important as what you put in it. The bottom of a raised planter box serves a few important functions, including providing drainage, preventing soil erosion, and protecting the underlying surface from water damage. With that in mind, here are a few options for what you can put on the bottom of a raised planter box.
One option is to use a layer of small stones or pebbles. This helps to create a barrier between the soil and the bottom of the planter, allowing excess water to flow down and collect in the layer of pebbles. The water will then evaporate, helping to keep the soil from becoming waterlogged. This technique is especially useful for plants that prefer well-draining soil, such as succulents and cacti.
Another option is to use a layer of activated charcoal or soil conditioner at the bottom of the planter. Activated charcoal is a type of carbon that is highly porous and has the ability to absorb excess moisture from the soil. When used in the bottom of a raised planter box, it can help to keep the soil dry and prevent root rot. Soil conditioner, on the other hand, is a type of material that helps to improve the structure and nutrient content of the soil. It can help to retain moisture in the soil, making it a useful option for plants that prefer a moister environment.
You can also use a layer of moss or coconut coir at the bottom of a raised planter box. Moss is a type of plant that absorbs and holds onto moisture, making it a good option for retaining water in the soil. Coconut coir is a type of material made from coconut husks and is often used as a soil amendment or potting mix. It has excellent moisture-retention properties and can help to keep the soil in your planter moist without becoming waterlogged.
In addition to these options, you can also use a layer of landscape fabric at the bottom of your raised planter box. Landscape fabric is a type of porous, non-woven material that helps to prevent soil erosion and weed growth. It’s also effective at allowing excess water to drain away, making it a useful option for raised planter boxes.
Finally, you can also use a layer of gravel at the bottom of your raised planter box. Gravel helps to improve drainage and prevent soil erosion, and it’s also a good option for protecting the underlying surface from water damage. Just be sure to choose a type of gravel that is appropriate for your plants and their needs.
In conclusion, there are a few options for what you can put on the bottom of a raised planter box to help manage excess water and protect the underlying surface. These include using a layer of small stones or pebbles, activated charcoal or soil conditioner, moss, coconut coir, landscape fabric, or gravel. Just be sure to choose a material that is appropriate for your plants and their needs, and be mindful of proper drainage and airflow. By adding a layer to the bottom of your raised planter box, you can help to keep your plants healthy and prevent soil erosion and water damage to the underlying surface.