Over the last few years I've struggling getting runner and climbing French beans to survive when planting out. Often only half of them survive and the others clearly have a setback with yellowing leaves. I usually grow them in RootTrainers to avoid root disturbance as I know they don't like it and am careful about planting them out well after the risk of frost in my area and always water them well after planting.
I've tried many times sowing them direct in good quality soil in raised beds but they never come up (?pests) even though the soil temperature is OK.
I am thinking of trying sowing them in a biodegradable pot then planting this in the soil but looking at the time for some of the products they are made of to degrade they degrade fairly slowly i.e. in a period of months. I would want the roots to spread out of the pot in a period of weeks not months otherwise growth would be restricted.
Anyone had any experience of using these for beans (or peas) or any other suggestions.