Grow Bags: A Handy Guide for Gardening Success

In the world of prepping and fostering self-sufficiency, grow bags offer an innovative means to cultivate essential crops in limited spaces, ensuring a reliable source of fresh produce in times of need.

In Between We Garden is a participant in the Amazon Services LLC Associates Program affiliate program.  This means that, at zero cost to you, I will earn an affiliate commission if you click through the link and finalize a purchase.  

What Are Grow Bags?

Grow bags are large, fabric-like bags that can be filled with soil and used to grow plants and vegetables. They are typically made of plastic, but can also be found as fabric pots in various breathable fabrics. They’re flexible, making them easy to use and light enough to move around.

picture of grow bag and several veggies that grow well in one

Plants that don’t have deep roots, such as tomatoes, potatoes, salad greens, herbs, peppers, and other similar vegetables, work best in grow bags. The rule of thumb is anything you can plant in a container, you can also plant in a grow bag.

Grow bags are a perfect solution if you don’t have in-ground garden beds. They’re great to use on small spaces like on a porch porch or balcony, but you can also line them up in a raised garden bed for a more traditional look.

There are many reasons to start gardening with grow bags. Here are some pros and cons.

The Pros of Grow Bags

Grow bags have a lot going for them. Here are some reasons you should use them.  

  1. They can be used anywhere: Grow bags are great because you can use them anywhere. If you live in a rental or have a small balcony, you can easily grow vegetables and plants in them. If you move, you can take your grow bags with you. You can even bury them in the ground if you prefer. 
  2. You can move them around: Grow bags are lighter than plastic pots and have handles, making them easy to move. If some plants need more sunlight or shade, you can easily move the bags to the right spot.
  3. Healthier root systems: In grow bags, plant roots are less likely to circle around and become root-bound like they do in other containers.  Thismakes the plants healthier and easier to prune because they have a more robust root system.  
  4. They regulate temperature: Some containers, like plastic pots can get very hot in the sun, but grow bags, made of breathable materials, allow excess heat to escape. Your plants will get plenty of airflow to help them grow strong.
  5. You can’t overwater them: Grow bags release extra water through holes in the material, preventing overwatering, mold, and fungus.    
  6. They’re easy to store: Empty grow bags fold flat and can be stored easily, which is great if you have limited space.
  7. No soil worries: Since you add your own soil to the grow bags, you don’t have to worry about the quality of your ground soil. It’s a great way to fertilize your plants.

The Cons of Grow Bags

Grow bags aren’t without their drawbacks. Here are some reasons you might prefer traditional pots:

  1. Need more frequent watering: Grow bags are porous, so water drains out quickly. You’ll need to water them more often than plastic pots. If you tend to forget watering, grow bags might not be for you.
  2. Less durable: Other pots can last many years, but grow bags usually need to be replaced every 2-3 growing seasons.
  3. Costs add up: Since you have to replace them often, grow bags can be more expensive than traditional pots.
  4. Appearance: Grow bags often come in plain colors like black, brown, or gray, and might not look as nice as some hard-sided pots.
  5. Can get heavy: While you can move grow bags around, some can get very heavy. If a grow bag weighs more than 25 pounds, it can be hard to move, and you might need to find a permanent spot for it.
picture of grow bags with crops in them

Felt or Plastic Grow Bag?

Felt Grow Bags

Felt grow bags offer several advantages for gardening enthusiasts. Firstly, they provide excellent aeration for plant roots, preventing root circling and fostering a healthier root system.

Additionally, these bags boast superior drainage capabilities, reducing the risk of overwatering and root rot. Moreover, they aid in regulating soil temperature, keeping it cooler in hot weather and warmer in cooler weather.

Another benefit is the promotion of root pruning, where roots are naturally pruned upon reaching the bag’s edge, encouraging the growth of new, healthier roots.

However, felt bags may have drawbacks, such as lower durability compared to plastic alternatives, especially when exposed to moisture and UV rays.

Additionally, their good drainage can lead to faster drying out, necessitating more frequent watering.

Furthermore, their flexible structure can make them harder to move when filled with soil and plants.

Plastic Grow Bags

On the other hand, plastic grow bags offer their own set of advantages and disadvantages. These bags are renowned for their durability, able to withstand harsh weather conditions and last longer than felt bags.

They also retain moisture well, reducing the need for frequent watering.

Moreover, plastic grow bags are often more affordable than their felt counterparts, making them a cost-effective choice, especially for large quantities or sizes.

Their lightweight nature and ability to maintain shape when filled with soil make them highly portable.

However, plastic bags have shortcomings, such as limited aeration for plant roots, potentially leading to root circling and less healthy root systems.

Additionally, their drainage capabilities may not match those of felt bags, increasing the risk of overwatering.

Plastic bags can also cause soil to heat up quickly, which may stress plants during hot weather. 

potatoes growing in a grow bag

What Do You Want to Grow:  Picking the Right Size Grow Bag

When it comes to selecting the right size of grow bags for your gardening needs, it’s necessary to consider the volume of soil each bag can hold. Here’s a breakdown of common grow bag sizes and their approximate cubic feet (cf) capacity when filled to the top:

For smaller plants like houseplants or annual flowers, a 2-gallon grow bag is suitable, holding approximately 0.30 cubic feet of soil. These bags are ideal for single plantings, providing ample space for root growth.

Moving up in size, a 5-gallon grow bag offers more room with a capacity of approximately 0.66 cubic feet of soil. This size can accommodate a single plant or a combination of smaller leafy greens, making it versatile for various garden setups.

For larger plants such as tomato plants, peppers, eggplants, or potatoes, consider using a 7-gallon grow bag, which holds around 0.93 cubic feet of soil. These bags are also suitable for woody herbs like rosemary or mixed food crops, such as a cocktail garden.

Stepping up to a 10-gallon grow bag provides even more space, with a capacity of approximately 1.3 cubic feet of soil. This size is perfect for long-season root crops like garlic or onions, as well as large herbs or small fruit trees like bay trees.

For gardeners with larger planting needs, a 25-gallon grow bag offers ample space, holding around 4.0 cubic feet of soil. This size can accommodate long-season root crops, potatoes, mixed greens, flowers, and herbs, providing flexibility for diverse plantings.

For even more significant planting projects, consider a 50-gallon grow bag, which holds approximately 6.68 cubic feet of soil. These bags are suitable for perennials, small fruit trees, and various vegetable crops, providing ample room for root expansion.

For gardeners looking to replace traditional raised beds, a 100-gallon grow bag is an excellent option, with a capacity of around 10.3 cubic feet of soil. These larger bags can accommodate shallow-rooted crops, leafy greens, and lettuce, offering a convenient alternative to traditional gardening setups.

Finally, for extensive gardening projects or large-scale plantings, consider using a 200-gallon grow bag, which holds approximately 26 cubic feet of soil. These oversized bags can serve as replacements for raised beds, accommodating perennials, vegetable crops, and other garden plants with ease.

By selecting the right size of fabric grow bags based on your gardening needs and the volume of soil required, you can create an efficient and productive garden space for growing a wide range of plants and vegetables.

Ready to Start Grow Bag Gardening?

If you’re ready to start gardening with grow bags, our Sunshine Preppers store offers a convenient solution with our 10-gallon bags featuring flaps. These innovative bags provide easy access for monitoring plant growth, as I experienced firsthand while cultivating potatoes earlier this year.

For those inclined towards fabric bags, I highly recommend the VIVOSUN 5-Pack 7 Gallon Plant Grow Bags.

And for larger-scale projects, the Gardzen 2-Pack 100 Gallon Grow Bags offer ample space and durability. Explore these options and more to elevate your gardening journey!

Exploring Grow Bag Options for Your Garden Needs

In conclusion, choosing the right size of grow bags is key to making the most of your gardening efforts. Understanding how much soil each bag can hold and matching it to your plant’s needs is essential for success. 

Whether you’re growing houseplants, leafy greens, or bigger crops like tomatoes and potatoes, there’s a grow bag size for you. 

If you’re ready to begin grow bag gardening, be sure to check out the resources above, including our Sunshine Preppers store.  

With the flexibility and convenience that grow bags provide, you’ll be well-prepared to create thriving gardens and embrace self-sufficiency. Explore our selection today and get ready to grow with confidence!