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They are not getting enough light and this is why they are leggy. Move a light source closer to them. I would wait to pinch them until they have a half dozen sets of true leaves, if you still want to pinch them at that time.

Yes, there is. Unfortunately, we cannot recommend places to purchase. I would check your local nurseries or online.

You should be leery of using ANY type of treated wood around edible plants, regardless of whether they are deemed safe, as apparently this type is. According to the EPA, this type of wood preservative is supposed to be safe enough to use in the garden. However, just to be on the safe side, I would probably go with vinyl. The choice is yours.

Pole beans are usually harvested 5 times (occasionally as few as 3 or as many as 10), with about 3 to 5 days between harvests. Pole beans should be harvested before they get tough and woody; thus, timing is important.

The leaves on my cucumber plants starting turning a yellowish color and I think it was from not enough water. We have had rain for the past 3 days and they seem to be looking better, they still have the yellow leaves on them but new growth has come out. As for the beans I don't have any knowledge on that.

I had same thing. I don't like to chemicals so I always try natural remedy first. I used a spray bottlefilled with water then added a teaspoon or 2 oh dawn dishsoap. It did stop the tiny tiny black fleas ASAP . Good luck .