It is really hard to say when plants should be harvested when they've only been flowering for 4 weeks.
Since this is your first grow, I totally understand how eager you are to get the buds nice and fat quickly, then chop them down and smoke them. If they've been flowering for 4 weeks, they probably need another 4 weeks. Those look like nice little buds, so with some patience your grow should be fine.
Harvest your plants when most of the pistils have turned from the white color they are now to a shade of amber.
Keep posting pics of your plants every few days, and within a few weeks someone will probably suggest you start flushing them in preparation for harvest.
dude what longer than a week. try to get a microscope to look at the trichs
Thanks for your response. I'll use that method from now on. I'd noticed the shininess you mentioned before...it's pretty sparkly right now actually. I Guess I'll sit it out for a while and see what happens.Hi - Here's a great way to spot if your plants are mature. When still unripe the trichomes will be clear. This gives you a "diamond shine" from the bud when you look at it under the lights. As the trichomes ripen they will become white/milky and the "diamond glittering" will disapear and you'll notice the whole bud just looses the shine and is more milky white. You don't need any magnifying glass. I have one, but never use it to dertermine maturity anymore. Remember that it can take several weeks from when it starts looking yummy until it's really ripe.
Hope this helps.
Harvest your plants when most of the pistils have turned from the white color they are now to a shade of amber.