whats happening anyone

this is my first grow which was going well up to starting flowering i have a 4 pot auto feed system using canna soil and nutrients i tried growing from seed pukka skunk and only one survived. i then put that in my grow room and kept it in veg till i germinated some serius seeds feminised and then also put those in my grow room.as i germinated 5 serius seeds and alresdy had 1 pukka skunk plant i put 4 of the serius into the autopots and 1 serius an the 1 pukka into normal buckets with drainage and decided to water them manually. starting off on weak nute sollution up to full now as there is 4 week to go. as i am new after 4 week of growth ib realised the tallest plant was male even though i bought femenised seeds so removed it as the other 4 serius plants looked different to that one. that left me with 4 serius in autopots an 1 pukka in a normal bucket. my problem which with 4 week to go prob cant be rectified is the 4 serius are pale green and dry. i thought 2 week ago the buds were starting but they look like they have opened up and tons of dust has fallen on the floor and coated the leaves which when you blow the plants it flies around like talcom powder. all 4 serius are like this but the pukka plant which is watered manually from the same nute resevoir has buds which look healthy and like most the pictures have looked at so if it is temp or nutrient that have caused this why has the pukka not done the same. i keep the temp between 20 light off an 28 light on ph around 6.0 to 6.3 stated cf 12 weak nut up to cf 16 then 20 an at min 24 plenty ventilation so dont understand anyone any answers please appreciate the help.

 

I'm a newbie myself, but if the buds have opened and you now have dust everywhere, it sounds like pollen. Are you sure that the others are all female? Perhaps hermies. I hear that is not uncommon with feminized seeds. If they are in fact hermies dropping pollen. Look on the bright side, all of your seeds will be feminized. On the down side, you buds will be full of seeds.

The other option is that I'm completely wrong. Perhaps you could post some pics.

Widowmaker

 

i cant get the photo size under the 150kb size to be able to post them i think maybe i have give them too much nute if you touch the buds they crumble in places like they have dried out and still if you blow the buds its like a spray of green powder, the buds are dry and crumbly to the touch in places. you touch them and have a powder green hand and parts of the bud fall to the floor.if they had turned to hermies an were dropping pollen surely the buds would still be moist just end up full of seeds but i cant see this happening. in places you can see the crystals on the stems if the plants were too close to the light surely only the top buds would dry out an burn an not all the buds even near the bottom of the plant. there are 3 weeks left till harvest not sure i can get much out of this grow but dont want to start again at end and same thing happen.