Not sure how to care for Lobelia.

[Bird]

Hi all,
I purchased these Lobelia plants in hanging baskets for our wedding. They were beautiful with lots of flowering. However, now 2 weeks later they seem to be root bound and not blooming any longer. I've done research on it's care, I've done pinching with no help. I cut off approximately 6 or so inches of length, again no help. Is my next step to trim them way back?

Thanks in advance for any help.
Bird

 

[cpp gardener]

Yes, trim them to the edge of the pot. Then start feeding them with a liquid/water-soluble bloom-type fertilizer. You have seen that they are very tightly rooted in their pots (normal) so they will need to be watered frequently, possibly every day. They are temporary annual plants and being tightly rooted or "root-bound" isn't a real concern. Live with it and modify their care, enjoy them for the summer and toss them when they die in the winter.

 

[Bird]

Thank you for your reply.