Ready or not ?

Hi, very bad light! It is necessary more information, what soil and fertilizer. Tell us more)

Not really enough info. What strains? how long have they been growing? do you have a jewellers loops or hand lens that can magnify ~ 60x? if so you need to check the trichomes and see if they are milky white and amber. if they are all still clear, then they are not ready. If they are about 5 - 10 % amber and the rest cloudy/milky white then they are ready for harvest.

Hard to see or tell anything under those blurples...

A picture in white light would help a lot, as would being able to see the buds up close. I use a inexpensive pocket microscope to look at ball on top of the trichomes. Many varieties are ready to harvest when most have turned Hazy/milky. I also like to wait until about 5-10% have turned amber which usually means 10% are clear, 80% milky and 10% amber. If you harvest earlier (more milky, less amber) you will get a more uplifting high. If you wait longer more will turn amber and you will get more relaxing couch lock stoned affect.