I know that multiflora likes more moisture, but twice a week might be too much unless it's hot and it's drying out pretty fast. Are you waiting for it to dry just a little between waterings? It's one of those that I water "as it begins to dry out" rather than "once it's dry." It's a really fine line. Mine isn't happy if it's either too wet or too dry. The one I grow in hydroton is the easiest to keep happy.

You may also want to back off on all the different stuff you're giving it. I keep it simple - I have a bloom booster I use weakly all spring/summer long and that's really about it. I use the Eleanor's VF-11 and spray the foliage, but not every time I water.

Denise in Omaha

I water mine the same way, sometimes I need to water 3x a week. 2x is pretty common for me, every house and climate is different. Mine is super dry and every window has a heater vent underneath. There is ideal conditions, and then there is what you have...;) Denise is right though, with the "just as its starting to dry", but I have also read of growers growing these suckers in trays of water too. And again, location probably matters but they are definitely water hogs.

I suspect other factors may be at hand here... 2 things that have made mine blast are-

-Cold temps

-not enough light

If the weather outside gets too chilly, the tender baby buds by the window are toast. Once they get past the round phase i to the "pointy" phase this doesnt seem to bother them.

I had bud drop in my house when I first got it, because of a bad location. It has been in a West window ever since, but now that the sun is returning will probably be summering in an adjacent North window. And I also lost tons of buds and flowers on the one I brought to work for 2 weeks. They handle moving around surprisingly well, but unsurprisingly hated the lighting there.

Now that I think of it, too dry will cause them to blast too.

Also... miracle grow bloom busters. Fed mine some the other day and I swear the buds nearly doubled overnight. I give it a tsp per gallon of water I think. Just started fertilizing that way, before just an occasional foliar feed with tapping roots 1 or 2 times a month if I remembered. I also mist mine pretty regularly.