Hi, I can't say for sure without knowing more about your crop. What variety do you have and look at the seed pack to see what it says for "days to maturity"? I know, from experience, that pole limas can be slow to develop a crop so it may be that you just need to be patient. Or, your plants are missing something they need such as enough sunlight. Or, you could be feeding them too much. Often if you give veggies too much nitrogren, they'll grow lots of foliage, but few flowers or fruit.