Sand.
Pure sand has no nutritional value for the plants, so sand and plain peat moss mixture is better--mung beans like pH of 6; although many commercial pot soil mixtures have the right pH, they also have chemical fertilizers in them thus should be avoided. If you want to experiment with sand, try to place some river stones in your pot, and remember, mung beans are warm-water plants and most aren't cold tolerant. Good luck!
Source(s):beans
Beans grow better in soil because soil has all the moisture and nutrients. If you use sand, it could be to rocky. Clay will also not be good even though it can keep good moisture it does not have the nutrients like soil.
Green beans grow better in soil.
I do not know why I was wondering the same thing They grow in rocky areas and near or in the ground.
Yes lima beans can grow without soil but it's not the soil that makes the difference it is what is in the soil................................ the nutrients.
Lima beans grow best in milk because milk has more nutrients.
Fresh water does grow the lima beans. and it is very fast too.
in what of materials do beans grow the best
soil
poopy in dogy dodo
Pinto beans can grow faster in ground or outside soil because it's more natural.
In the soil !!!! But beans grow better in cotton