Just a rant,
I bought some blyxa japonica from a LFS, it was in pretty bad condition but hopefully I could save it. Then found someone locally with it and got a few also.
My tank can grow plants, everything in there is super healthy. But unfortunately it wasn't enough to save the store bought blyxa japonica, but the ones I received from a local hobbist tripled in size.
Sometimes, some stores, it's best to buy the plants before it hits their tanks if they don't have the proper conditions for growing plants. Sometimes, it might be better off to buy plants off bca members who has them healthy growing and thriving in their tanks.
I guess the other advantage of buying plants off local members is they are already in the submerged forms, where as some of the lfs ones and aquaflora ones are emersed forms.
Although I've had a lot of success with aquaflora plants transistioning from emersed to submerged growth.