I'd wait until fall for the jonquil, but yes, they look like they are getting a little crowded.
What I would do on the strawberries is treat them like you are renovating a bed.
After fruiting is done, clip off all the leaves leaving an inch or two of stem, dig them up and transplant. Fertilize with around 50-60#/acre actual N and keep them well watered. They will start growing, sending out tillers and give you a good crop next spring.
When I renovate my bed, I cut off all the tops, then run the tiller down each side of the bed, leaving about 12" wide in the center, fertilize and give it plenty of water. Tilling thins it out a little, and loosens up the dirt so runners can root easily.