I sowed some late courgette(zucchini) and needed to transplant a couple. They were all much the same size when I moved 2 of them to another planter. 2 weeks later, the difference is obvious. The ones on the right were transplanted. I'm a visual type of person and now I see the difference sowing and growing in situ has made, I'm wondering if it's worth the effort of starting some things off in pots to get an early start at all.