pistols turned brown ( pictures )

the tiny white hairs/pistols from the buds are fine but the pistols here on the stalk of the plant turned brown and shivered up. The plants are auto flowering dwarfs. any help be greatly appreciated thanks.
edit- one thing i do have trouble with is finding a good amount of water to give them, i water them every 3-4days with 400ml of water. I have been doing 200ml every 3-4days but as they started flowering the pots are dry the very next day. potsize is 3gallon, plant size around 19inches.and the other three around around 21inches. i know thats a bit tall for auto flowers, i stretched them in the beginning=/

Pre flowers. No worries. Soap spray and some neuts will do this too.

^^ Yup, absolutely no reason to worry. ^^

It's best to water when top soil is dry. Stick a finger 1-3 cm into the soil. If it feels dry, water. It's ideal if 15-20% of the amount of watering solution poured into the pot manages to run off into the dish under the pot.

Or "Lift the pot"

Every time i watered there has not been any drainage come from under the pots. pots are actually 3gallon plastic trashcans that i poked 3holes in bottom of each.

what is your light times?

u are not watering enuf!! u should lift ur pot when dry and remeber how light it feels, then water the plant until just a little water runs from the drain holes at the bottom, then feel the weight of the pot when its wet, leave the top 2-3inches of the soil dry then water again, hope this helps!

thanks, timer on lights are 18/6.

Truhigh said:

Every time i watered there has not been any drainage come from under the pots. pots are actually 3gallon plastic trashcans that i poked 3holes in bottom of each.

Click to expand...

youre watering too frequently with too little water. Only water the plant when it needs it, like the others have mentioned, and when you water it you want to give it a good watering to get all the soil wet from top to bottom. when the top bit of soil is dry, the bottom is still wet, and the roots grow down in search of water.