Hello all

I’m wondering if anyone has suggestions to fill in ~3’ gaps in a bed that is full sun south facing in zone 5.

Currently the bed has some big phlox (white), many alliums poking up through the seasons and some cone flowers, both in shades of purple. There’s also 3 lilies towards the middle.

I’m not sure if some things have died off….I know one gap is because a cone flower had some sort of weedy parasite mixed in, and had to be taken out.

Just wondering if anyone has ideas to fill in the spaces. Or should I just divide the phlox and add some coneflowers to stay consistent?

Or, I’m sure some will chime in and let me know this bed is already crammed full. Thanks :)