Adorable botanical gardens of your own rosie. I adore viewing growers grow areas. Very curious what is the plant 2nd photo down on trellis frame far left with the big bold robust stems and apple green leaves. Quite a beauty in its shape and form! I would certainly reduce your fertiliser applications by halving the doses now that you have given them all a good start, very healthy and strong! Less is definetly better, let them enjoy the full colour spectrum of the sun abit more, but not direct ofcourse - orchid bbq! Red tinting to leaves will indicate sufficient exposure as will a lighter apple green rather than dark. You have laid the foundations for a good display for you this year- fingers crossed!