NASTURTIUM : WHAT SHOULD I DO...?

In August, I bought a cluster of nasturtium plant from a roadside nursery.
Then I divided it into three pots.
In the first month they looked grew so well.
But the growth looked worse.
The first plant with the yellowish leaves, look so poor.

Two other plants with wrinkled leaves and dried.

Then, I pruned all the leaves,  and hoping the growth will be better. 

This is for the first time I grow nasturtium. 
Please help me, what should I do? 
Thank you...