Dying Bacopa plants

[SuePearce]

I bought 10 bacopa plants a few months ago & they thrived for some time, producing lots of mauve flowers. Recently 2 looked like the leaves were shrivelling up & going brown. The result was 2 dead bacopa plants. Now it looks like 2 more are following in the same pathway. Any ideas? I’ve attached photos of a healthy plant plus one on its way to dying plus a dead one. 

[Jewelleryrescue]

Hi @SuePearce 

Merry  xmas morning to you,

The  plants look healthy  enough apart from the dying bit.

We have one  growing ok in dappled  shade.

I would try environmental  changes water them in  the evening after the suns heat drops off  try shading one as test shade cloth from hot  sun and winds if this is happening.

I might put a shovel in under one of the sick  ones and lift the root ball trying not to disturb the plant to much I would  be looking for the white curl grubs that love eating tender young roots

A seasol tonic might perk them up at  least wont hurt  them.

Hope they flowering again soon.