Make Your Own Grow Bags: An Easy, Cheap, and Sustainable Guide
I love grow bags. They’re flexible, light, and perfect for patios, balconies, and small gardens. After years of buying expensive commercial bags, I started making my own and haven’t looked back. In this guide I’ll show you why to make your own grow bags, which materials work best, step-by-step instructions, and practical tips from my own experience so you can get growing quickly and confidently.
Why Make Your Own Grow Bags?
Grow bags are simple fabric pots that breathe, drain well, and encourage healthy root systems. Making them at home gives you control over size, fabric, and cost. Here are a few reasons I switched to DIY:
- Cost savings — You can reuse old sacks, tarps, or heavy fabric instead of buying dozens of plastic pots.
- Customization — Choose sizes, handles, and reinforced seams for your specific plants.
- Sustainability — Repurpose materials and avoid single-use plastics.
- Better root health — Breathable fabric reduces root circling and improves aeration.
Quote from the Garden
“The first tomato I grew in a homemade bag produced more fruit than any plant in a store-bought pot. The roots loved the air, and I loved the savings.” — Me, after the first summer
What You’ll Need
Before you start, gather a few basic supplies. You don’t need a lot — just practical items you can find around the house or at a hardware store.
- Strong breathable fabric: landscape fabric, burlap, felted wool, or thick polypropylene (reclaimed flour or rice sacks work well)
- Heavy-duty scissors or a utility knife
- Sewing machine or strong needle and heavy thread (for hand-stitching)
- Staple gun and staples (optional reinforcement)
- Measuring tape and marker
- Grommets or drainage punch and rivets (optional)
- Strips of webbing or old belts for handles
Choosing the Right Fabric
Fabric choice changes how the bag performs.
- Breathable fabrics (landscape fabric, felt) dry quickly and prevent root rot.
- Burlap is natural and cheap but degrades faster—good for temporary bags or single-season use.
- Polypropylene woven sacks are durable, inexpensive, and last for years but are less eco-friendly.
- Avoid non-breathable plastic; it defeats the point of a grow bag.
My Pick
I mostly use recycled landscape fabric and old feed sacks. They strike the balance between longevity and breathability for tomatoes, peppers, and herbs.
How to Make a Grow Bag: Simple Step-by-Step
Below is a basic pattern that scales easily. I made dozens this way; it’s fast and forgiving.
Cut the Fabric
- Decide on the size: a 12–15 gallon bag is about 20–24 inches wide and 16–18 inches tall when stitched. For potatoes you might want 20–30 gallons.
- Cut a rectangle double the width of your finished bag plus 1–2 inches for seams, and the height you want plus seam allowance.
Sew the Sides
- Fold the rectangle lengthwise with the right sides together and sew along the long edge to form a tube.
- Turn it right side out and sew the bottom closed, either flat or boxed for a flat base.
- Reinforce the seams with backstitching or a second row of stitches.
Add Handles and Drainage
- Sew or staple handles at the top so you can move the bag easily.
- Punch small drain holes or cut slits around the bottom perimeter to ensure good drainage.
Finish and Test
- Turn the top edge down to form a cuff — this looks neat and adds strength.
- Add a layer of landscape fabric inside for extra root aeration if desired.
- Fill with potting mix and water to test for leaks or sagging.
Filling Your Grow Bag
Use a loose, well-draining mix to get the most from your bag. My favorite recipe:
- 40% quality commercial potting mix
- 30% compost (well-aged)
- 20% coarse perlite or pumice
- 10% coconut coir for moisture retention
Fill the bag to about 2–3 inches from the top to leave room for watering. Water well to settle the mix and top up as needed.
What to Grow in DIY Grow Bags
Grow bags are versatile. Here are my tried-and-true choices:
- Tomatoes and peppers — I get excellent yields in 15–20 gallon bags.
- Herbs — smaller 3–5 gallon bags are perfect for basil, parsley, and chives.
- Potatoes — use tall 20–30 gallon bags and layer soil as plants grow.
- Small vegetables like lettuce, radish, and bush beans — use shallow bags or bags cut open to make grow beds.
Care Tips and Troubleshooting
Some practical notes from my experience:
- Watering frequency: Grow bags dry faster than pots, so water more often in hot weather. Check moisture daily.
- Fertilizing: Use a slow-release granular fertilizer at planting and supplement with liquid feed every 2–3 weeks during peak growth.
- Cold climates: Move bags into shelter or wrap them for insulation during frosts; fabric helps but is not foolproof.
- Stability: Larger bags can tip in wind. Group them or place them near walls for support.
Reuse, Storage, and Longevity
Depending on material, DIY grow bags can last from one season to several years. I recommend these routines:
- Empty and compost old soil at season’s end.
- Wash and dry bags thoroughly before storing in a dry area.
- Repair seams with strong thread or fabric glue to extend life.
Benefits and Drawbacks
Honest pros and cons from a gardener’s viewpoint:
- Pros: Affordable, customizable, breathable, good root health, easy to store.
- Cons: Dry out faster, some fabrics degrade in sun, may need more frequent fertilizing and watering.
Final Tips and Favorite Projects
If you’re new to DIY grow bags, start small: make three 10–15 gallon bags and grow tomatoes or herbs. You’ll learn how your climate and watering routine interact with the fabric you chose. I love making multi-pocket bags for vertical herb gardens and reinforced 20-gallon sacks for a summer of prolific tomatoes.
Every gardener has a different rhythm. My best advice: experiment, keep notes, and don’t be afraid to tweak the fabric or fill. Once you nail the size and mix, homemade grow bags become a joyful staple of the growing season.
Happy planting — and if you try making your own, tell me what worked for you. I love swapping tips and seeing photos of other gardeners’ creations.
