Floppy, Weak Branches

Hi everyone,

Current grow is Maui Wowie and we are 2 months in to flowering. Everything has been amazing with this plant, but today I noticed several branches are flimsy and flopping over. Soil moisture is normal, PH is neutral. I've also noticed pistils dying on these branches, yet the leaves look healthy in color despite being flimsy as well. They're not nice and firm like the others.

What could be going on? I'm using a 600watt hps and the nutrient trio from Fox Farm at about 50% strength. I've also been using a fan since day 1 to strengthen the branches.

Here are some pics.

1. wow, those plants look very stretched, how far away is your light?
2. 600w hps 2 months into flowering? those buds are very small for that time, did you mean 2 weeks?
3. you mentioned you are using fox farm nutes at 50%, which soil medium are you using it in?
4. could you take some photos of the plants with the hps light turned off, so we can get a better look?
5. what are the temps, and humidity levels?

That plant looks very stretched, that's a huge sign of not enough light. Also notice the very thin stems and small leaves. Light is too far away or too weak. That plant isn't going to flower nicely at all unless you get it growing right for another 10 weeks.