The RHS recommends composting for at least 12 months.
If you type 'Garden Design Software' it comes up with loads some aimed at the professionals and others at amateurs. There is a free download list from Gardeners World shown. Anyway it might be worth you looking.
So when do you go Dove because that is exactly what is needed
I have Rudbeckias on clay soil and they love it.
Trachelospernum jasminoides might be OK in a pot. Has the benefit of a beautiful scent. You will need to be very diligent in watering for any climber
The plants seem to be loving this weather.
It could be a Hibiscus but not sure which variety
They will be caterpillar eggs. Squash immediately or you won't have any cabbages to harvest
Thanks Dove, that's very useful. I'll give it a try.
Have you tried the company website? They may have a FAQ page that might help.