Those babies are stressed to the max, that's what is making them flower, they are trying to breed before they die. what is in the center of the biggest one? can you post a side view bc that looks like a pollen sack that has opened from the top down view. also that media you had them in with the wood chips looked an awful lot like happy frog which has food in it and is used as an easy way to veg, The nutrients are time released and last for a few weeks, So if you were putting nutrients in that media it got super hot. I see the guys telling you to test your run off PH but your run off PPM is also very important, if you get to about 1.5 times the in-going PPM you should flush until it goes down and try to figure out why you have a build up. PH can cause the build up because the plants can't pull in the nutrient, Over feeding will cause both a PH problem and high PMM as the nutrients that build up will cause the media to become acidic or basic depending on what nutrient is being over fed.