What Do You Put Under Grow Bags? (4 Options)

If you’re a homeowner looking to start a garden, you may be wondering what to put under grow bags.

Grow bags have become increasingly popular in recent years as they offer several benefits over traditional gardening methods.

They are lightweight, portable, and easy to use.

They also allow for better drainage, which can help prevent root rot and other moisture-related problems.

But what should you put under your grow bags to ensure your plants thrive?

In this article, we’ll explore the different options and discuss the benefits of each. But first, a table chart.

Table Chart: What to Put Under Grow Bags

Layer of Gravel or RocksImproved Drainage, Better Air CirculationAdds Weight, Expensive
Layer of Landscape FabricPrevents Weeds, Improves DrainageCan Tear, Requires Periodic Replacement
Layer of Compost or SoilProvides Nutrients, Improves DrainageExpensive, Adds Weight
No Bottom LayerMaximum Air Circulation, Easy to UseProne to Weeds and Pests, Difficult to Move

What to Put Under Grow Bags to Improve Yield

Here are the most effective options for growing plants in grow bags; 4 things to consider putting under the bag.

Option 1: A Layer of Gravel or Rocks

One common option is to put a layer of gravel or rocks under your grow bags.

This can help improve drainage and prevent water from accumulating at the bottom of the bag.

It also allows air to circulate around the roots, which can help prevent root rot and other moisture-related problems.

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However, there are some downsides to using a layer of gravel or rocks.

Grow Bags

For one, it can add weight to your grow bag, making it harder to move around. It can also be expensive to purchase enough rocks or gravel to cover the bottom of your grow bag.

Option 2: A Layer of Landscape Fabric

Another option is to place a layer of landscape fabric under your grow bag.

This can help prevent weeds from growing up into the bag, and also helps improve drainage. It is also relatively inexpensive and easy to find at most garden centers.

However, landscape fabric can also be prone to tearing, and can eventually break down over time. This means you may need to replace it periodically, which can be a hassle.

Option 3: A Layer of Compost or Soil

Some gardeners choose to put a layer of compost or soil under their grow bags.

This can help provide nutrients to the plants as they grow, and also helps improve drainage. It can also help prevent the grow bag from drying out too quickly.

However, this method can be expensive if you need to purchase a lot of compost or soil. It can also add weight to your grow bag, which can make it more difficult to move around.

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Option 4: No Bottom Layer

Some gardeners choose to simply place their grow bags directly on the ground, without any additional layer underneath.

This can work well if you have a relatively flat, level surface to place the bag on. It also allows for maximum air circulation around the roots.

However, if your soil is prone to weeds or pests, this method may not be ideal. It can also make it more difficult to move your grow bag around if needed.

When Did Grow Bags Become a Norm for Growing Plants?

Grow bags have been used for many years in commercial agriculture, particularly for growing greenhouse crops such as tomatoes, peppers, and cucumbers.

However, their use in home gardening has become more popular in recent years, as more people are looking for alternatives to traditional gardening methods.

The exact timeline of when grow bags became a norm for growing plants in home gardens is difficult to pinpoint, as their popularity has grown gradually over time.

It’s safe to say that in the past decade, they have become increasingly popular among gardeners of all levels, from beginners to experienced horticulturists.

One reason for this increased popularity is the ease of use and versatility that grow bags offer.

They are lightweight and easy to move around, which makes them ideal for small gardens or urban spaces where space is at a premium.

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They also offer better drainage than traditional garden beds or containers, which can help prevent problems like root rot and overwatering.

In addition, many gardeners appreciate the fact that grow bags are more environmentally friendly than plastic containers, as they are often made from materials like fabric or recycled plastic.

This makes them a popular choice for those who are looking to reduce their environmental impact while still enjoying the benefits of gardening.

Overall, while the exact timeline of when grow bags became a norm for growing plants in home gardens is unclear, their popularity has grown steadily in recent years, and they are now a common sight in many gardens and greenhouses around the world.


There are several different options for what to put under grow bags.

The best choice for you will depend on your specific needs and circumstances.

If you’re looking for maximum air circulation, no bottom layer may be the best option. If you want to prevent weeds and improve drainage, landscape fabric may be the way to go.

Whatever you choose, be sure to consider the benefits and drawbacks of each option before making your decision.

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