There are several 15 gallon bags available on Amazon but most are deeper and narrower than these. These are more wide & shallow, which is exactly what I was looking for to re-pot my 3 year old avocado trees as they have roots only 6" deep . Once filled with potting soil the bags are heavy and not very maneuverable but the handles are study so you can lift the bags to slide a plant dolly under. I would highly recommend setting the bags on some sort of base for better drainage. I had these bags for a few months now. They have green mold growing on the outside from moisture but they are not falling apart yet. I will update my review if they fail within a year. Since all excess water drains out, I do have to water these more often than plants in terracotta pots, so I was given a good advice I want to share. To know when you need to water your tree again without having to dig in dirt to check for that 1" dry soil plant a few flowers close to the edge of the bag - once the flowers start to droop, it is time to water!If you are intending to use these for an avocado pot, you may want to check your variety first:My "Fantastic" , "Joey" and "Hass" varieties did just fine over winter in plastic nursery pots (I didn't put them in the ground in case it freezes) and even rewarded me with one tiny fruit last year. The trees were healthy and full of leaves yet they did not handle transplanting well (or didn't like that much air in the bag) & within 2 weeks dropped all leaves. However, "Lila" avocado loved the new big pots and doubled in size in 3 months. For Memorial weekend our Home Depot got a large shipment of fruit trees so I bought another "Joey" & "Fantastic" avocados since they were $38 vs. $70 at the nursery. They both got planted in these 15 gal bags I ordered more of. "Joey" dropped ALL leaves again & shows no sign of life. "Fantastic" dropped some leaves but is still hanging there. It is South Texas and >100F right now so I have to water every other morning instead of weekly. These grow bags may be drying out too fast for the avocados. They work great for citrus trees though! I have Meyer's Lemon, Key Lime, and Calamondin Orange planted in these bags and all 3 doing great and have so many fruits in various size & shade of green I had to cage the trees for the branches not to break!