TopoGrow 2-Pack 25 Gallon Fabric Grow Bags Review (2026)

Why you should trust this review

I bought these bags with my own money for my own garden, not as a sample from TopoGrow. That independence matters for grow bags because the failure modes only show up under load and across a season. A bag that looks fine empty can bulge, lean, or tear at the seams once you put 60 pounds of wet soil in it. I planted and grew a full season in these, so what follows reflects how they actually behave filled, watered, and bearing a real crop.

How we evaluated

I filled both bags to capacity, planted potatoes in one and winter squash in the other, and grew them through a full season. I watched the fabric for bulging and leaning under full soil load, checked drainage after heavy watering and rain, monitored the seam stress at the base, and tested the handles for any practical lifting. I also paid attention to footprint and placement, since a 25-gallon bag is a large object in a garden bed or on a patio.

Volume and which crops it suits

Twenty-five gallons is genuinely large, and that is the entire point of this bag. It gives potatoes the 12-plus inches of soil depth they need for proper tuber development, and it gives squash and pumpkins the root volume they demand to size up. Smaller fabric bags simply cannot support these crops the way this one can. For potatoes, two to three seed pieces per bag is the right density; more than that and they compete for root space and total yield drops. If you are growing big root-volume crops, the 25-gallon capacity is exactly what you want.

Structural integrity under load

The heavy woven polypropylene is noticeably sturdier than the thin nonwoven material on budget grow bags. Filled to capacity, the bags held their shape without bulging out at the sides or leaning, which keeps the soil column upright and the plant stable. Through a full season of watering and weather the base seams held without any sign of failure. This is the difference that justifies the bag: the fabric is thick enough to keep its form when a cheaper bag would sag into a slumped heap.

Drainage and air pruning

Drainage was reliable. After heavy watering and rain the fabric let excess water pass through rather than pooling, which kept the soil from going waterlogged. The breathable weave also supports air pruning at the bag walls, encouraging a denser root system instead of circling roots. It is not the most aggressive air-pruning fabric I have used, but it does the job well enough for these large crops, and the drainage performance is the more important benefit for water-hungry plants like squash.

Handles and the weight reality

Here is the honest limitation. A fully loaded 25-gallon bag weighs roughly 60 to 80 pounds with soil, and the reinforced fabric handles are not practical for lifting that. They are fine for repositioning an empty or partially filled bag, but do not plan to carry one full. The right approach is to set the bag in its final location first, then fill it. For any later moves, empty it or slide a dolly underneath. The roughly 20-inch diameter when filled also takes up real space, so plan placement before you commit.

Who should buy the TopoGrow 25 Gallon grow bags?

Buy it if you are growing large root-volume crops: potatoes, winter squash, pumpkins, or anything that needs deep soil and a big root run. Buy it if you want fabric that holds its shape under a full load rather than slumping, and you value getting two productive bags in one purchase. Buy it if you have a defined spot where the bag can live for the season, since it is not meant to be shuffled around once full.

Skip it if you are growing smaller plants like herbs, peppers, or single tomatoes, where a 10-gallon bag is more practical and easier to handle. Skip it if you have limited space, because the roughly 20-inch filled footprint is large. And skip it if you need to move your containers frequently, since at 60 to 80 pounds filled these are effectively stationary for the season.

The verdict

For large-crop container growing, the TopoGrow 25-gallon bags do exactly what they should. The capacity gives potatoes and squash the deep soil and root volume they need, the heavy woven fabric keeps its shape under a full load instead of bulging or leaning, and drainage held up through a full season of watering and rain. The two-pack is enough for a genuinely productive pairing. The limitations are physical rather than quality problems: filled, the bags are too heavy for the handles, so you fill them in place, and the large footprint needs to be planned around. With end-of-season emptying and washing, the heavy fabric should give several seasons of use. If you have a big root crop and the space for it, these are the right bags, and the value across two of them is hard to argue with.