Succession sowing/planting?

Thanks for asking that Danny.  I'm hoping to religiously successional sow next season.  Usually I fill up the ground asap and have no room to sow further.  I was wondering at what intervals to sow  CFB and DFBs and maybe courgettes.  Thanks PP for the info.

Hiya JJB

Snap hence the question, lets see how we get on and remind one another