Your right ! Our Pacific NW weather has been long, cold, wet n crappy ! I’m live in the Cascade Foothills about 20 or so ms SE of Seattle.
Let me say this ! I’ve add mine but … I have a very strong strong double deep under it ! And our large leaf maples are in full bloom at the beginning when I added it last week.
But let me ask you this please … Have you rubbed or rolled a hardy amount if bee wax to each of your frames yet ? I was able to add mine 1st of August 2016 so my bees sealed the crack n seams in most of the frame-cells. It was too late for any nectar storage but my girls did prep the frames for this season after I uses a 2" paint roller to add a good coat of beeswax to my frame. ( Oh ! When you DO ADD the Super spray/drown/soak with 1:1 sugar syrup ) it really helps !!!
Do you have a really strong nectar flow now or soon. Your bees often will NOT GO into the Flow–Super without that added push ( so I’m giving you a heads up on that ). Us far northerners have to do n think a bit more. As Dawn noted, a deep n medium might not be enough push to get them to rise up I waited for my double deep to be exploding n they are up there n working but still No Nectar that I see yet.
Not sure what your "Big Main Nectar Flow is in the Island or in your region there . Our biggest Push n Flow will be the huge Wild Blackberry bloom about first of July onward for about one full month.
I’d personally add that additional medium n get it drawn out … The more pressure/bees without a swarming the better chance of success n harvest. I’d get the Flow-Super prepped n ready n also let you colony get better revved up !!
As Dawn noted … Check with local Beekeepers, Assiciations n a good local mentor. I’m close but my advice still isn’t totally Vancouver Island/next door knowledge !
I’d start making a plant n flower blooming calendar. This info n approximate dates are very helpful at encouraging your colony to build work force/numbers of workers up to meet the foraging demand of a good nectar flow … I have a hive monitor on my Flow-hive to see if I could use the hives temps n flower chart to cordinate work force n blooms. It’s still in the learning stages but seems to be at least helpful !! It’s a huge learning curve.
Norma … I hope I haven’t messed you up. Just giving you food for thot more locally !
If you go ahead n it doesn’t work add that to your learned info !! We learn from our triumphs n screw-ups both !