It is very normal for plants to nearly double in size before the flowers actually form. This is also a time when the "chemical" messages in the plant tell the plant to grow quickly, and spread root quickly, to support the flowering process.
This energy works well in rooting cuts. If you take them before the first week, and after they start to stretch, they form nearly perfectly. These are on the edge of late.
I am dominating this thread. Let's move this to a cloning thread or something??