Tip #1
Start your shoot 1 to 1/2 hour before sunset. This is always my favorite time to shoot, no matter what it is. If you've worked with me before, then you have seen me geek out at this time of day. I get super excited about how pretty the light is right before sunset, and sometimes cant stop myself. I'll keep lying to you and telling you "just one more" :) You'll quickly learn its never just one more.
Not only is the light really perfect at his time of day for skin tones, but also for the flowers. Yellows and greens can be very harsh and really outshine your subject, in portraiture you always want your subject to be the main focus, so when the light is too bright so are the flowers.