Remember the old white woven sacks that were supplied as recycling bags, back in the day? They were very strong and came complete with an equally strongly attached handle and were square, maybe 2 feet long by 15 inches wide. I slitted the sides for plants, with 3 or 4 plants per side, the foliage passed through from the inside, then back-filled the whole bag with decent compost enriched with chicken manure pellets and hung them over a raised bed on a frame erected for that purpose (a post at either end, with angled strengthening supports, and a piece of 2 by 4 connecting the two along the center line of the bed. Sturdy hooks were screwed in the underside of the 2 by 4) They were just as productive as bed-grown strawbs and virtually pest free, although I had to net them against the birds.
