These are great for trailing plants up the walls of a greenhouse and over the roof. Superb crop of cucumbers - 4 plants crossing over the roof and down the other side. Going to try it with tomatoes, melons and aubergine next year. However, a large bag of these for a whole greenhouse would be more useful than the little pkts they are sold in.
These are a great little item & have proved very useful..not only for hanging baskets up in the greenhouse but also for securing greenhouse shading on bamboo canes & hanging up trowels, secateurs, etc. Great product.