Hi,
I am no expert for sure but i am sure once solids are firmly established she will automatically go to a four hour easy.
Ds went to a 5 hour.
I started solids early so went well, but once I started 3 meals a day it took quite awhile. You do have to be consistant with it though. I would start with one meal, than 2 and so on.
Although i did have a couple set backs, like one week 3 meals went great, next week not so great, then good again, thenit was fruit only, then it went to veg only with fruit on the spoon with it, and then there was teething.............
My advice for you is to be constistant, but not to stress if lo does want right at this time.
I know a lot of it now with ds(8months)is textures, hes very fussy. Dp and I are to, so......
HTH,
it'll come