YellowSeeds

After 7 weeks of flowering, my 3 plants turned into seeds, not seed to be germinated but more bigger and soft. Do the supplier has a part of responsibilit?

Hi everybudy, i am a new member from Quebec, my english is not too bad but could be better. I would like to know more about flushing. Since I puted a 20-20-20 formula only one time during its vegetative state and some 2-8-4 one time at the beginning of its flowering 5 weeks ago. Since I have only putted this amount of nutriments, do i have to flush it for 7-8 days before the cutting?
Many thanks