What to Put on the Bottom of Your Raised Garden Bed

What to Put on the Bottom of a Raised Garden Bed: A Comprehensive Guide


Raised garden beds have become increasingly popular among both seasoned gardeners and beginners. These elevated structures offer numerous benefits, such as improved drainage, better soil quality, and easier access for planting and harvesting. However, many people wonder about the best materials to place at the bottom of their raised garden beds. In this article, we will explore several options that can help optimize your gardening experience.

The Importance of Proper Drainage

Good drainage is crucial for healthy plant growth in any type of garden bed. When it comes to raised beds specifically, ensuring proper drainage becomes even more critical due to their enclosed nature. Without adequate drainage, excess water can pool at the bottom of the bed and lead to root rot or other plant diseases.

1. Landscape Fabric or Weed Barrier

One option for lining the bottom of a raised garden bed is landscape fabric or weed barrier cloth. This material helps prevent weeds from growing up through the soil while still allowing water to drain freely.

While landscape fabric may not be necessary if you plan on installing a weed barrier above ground level (such as cardboard), it can provide an extra layer against persistent weeds when used in combination with other methods.


– Effective at preventing weeds
– Allows good drainage


– May deteriorate over time
– Can hinder beneficial organisms from reaching the soil

2. Cardboard or Newspaper

Using cardboard or newspaper as a base layer in your raised bed is an inexpensive and eco-friendly alternative that also suppresses weeds effectively.

Simply lay down several layers of dampened cardboard or newspaper directly on top of existing grass or vegetation before adding soil to your raised bed structure. Over time, the cardboard or newspaper will naturally break down and become part of the soil.


– Helps smother existing weeds
– Biodegradable and environmentally friendly


– May require additional layers for persistent weeds
– Can decompose relatively quickly, requiring occasional reapplication

3. Gravel or Pea Gravel

Gravel is another option to consider when lining the bottom of your raised garden bed. This material helps with drainage by preventing soil particles from clogging up the openings in your bed’s base.

A layer of gravel at the bottom can also aid in preventing waterlogged roots during heavy rainfall or overwatering, as it allows excess water to flow away more easily.


– Excellent drainage properties
– Provides stability to the bed structure


– Requires an adequate depth layer (around 2 inches) for optimal effectiveness
– Can be costly for larger beds


When constructing a raised garden bed, choosing the right materials for its base can significantly impact plant health and overall success. Whether you opt for landscape fabric, cardboard/newspaper, or gravel/pea gravel, each option offers its own advantages and considerations.

Remember that while adding something at the bottom of your raised garden bed can contribute positively to its performance, it’s equally crucial not to overlook other key factors like proper soil composition, regular watering, and appropriate sunlight exposure. By combining all these elements effectively, you’ll create an ideal environment that promotes healthy plant growth and bountiful harvests in your raised garden beds.