Is this ready to Harvest?

This will be my first harvest, this is grown in Hydro, and the leaves are starting to change colors, I don't know if it is not getting proper nutrients or what is causing it (T5 lights).

Does it look like it is about ready to harvest or can anyone tell from pics?

I don't see much growth in the last week.

I also heard I should let them go dark for 24 hours before I harvest?

Thanks

I would let it ride a while longer. Your leafs look crispy but the bud don tlook quite done yet maybe a week or two more.

i would let them go a bit longer as well. Atleast a week but two I think would be better. I would also remove the dead leaf as that is a starting point for mold.

Nope. Not ready

the bud doesn't look completely finished yet..
when my plants start to look like this i tend to clip some of the crispy leaves a little. i believe it helps the light reach the buds better helping it get finished up nicer as well.
haven't met another person that does this but to each his own.. also helps save me time in the end when it comes down to trimming and clipping it all anyways. lol

Looks like you have some cultural issues going on there. Moisture on the leaves? Could be over/late in the day misting, lack of air circulation, poor exhaust or high humidity. I'd check that out... Make sure everything is running tickety-boo.

the plant has no leaves left to photosynthesize so it can no longer grow, if it did still have healthy foliage i would say you are 2-3 weeks from being done.

as it is i would just chop it now and be happy with what you have.