Sorry - I realise my post comes across like a voice of doom, when you have made a lot of effort to prepare the beds. Hopefully, if you are aware of the potential issues, and like the others say, feed and water regularly, the new plants will cope and go on to thrive. And if they seem to be sulking, you will know that there's a good reason, and can do something in time. The further forward you can put things the better. I have to say that I began my gardening activities by choosing plants I liked and putting them wherever I had a space with little regard for prevailing conditions, and learned the hard way, and am desperately keen for others not to be disappointed. I wouldn't want to dishearten anyone!