Buds not swelling up gaps.

[Rusty Trichome]

I have 2 plants, both are 56 days old. only 20 percent or less of buds have red hairs.

The hairs (pistils) are not an indicator of maturity, the trichomes are. You'll at least want a 5x magnifying glass. Some folks get a 100x pocket microscope from Radio Shack. (under $20) Do a search here on CanCom for trichomes. :thumbsup:

I believe it has about 2 to 4 weeks to finish. Buds are swelling more and more everyday, but they have yet to swell into gaps of main cola on the taller ones, but the shorter one has swelled nicely...just not as i've seen on other grows.

Likely a slow finishing sativa blend. Tiz one of the problems with bagseed. You go at it blind.

not the best genetics, just a bagseed grow. but it's a very badass couple of plants...ones a foot and 8 inches, the others a foot. both have stopped stretching....

Best to fill-in the troubleshooting form as best you can. Their size aren't where a plant 7 weeks into flower should be.

should I worry?,

IDK. Worrying helps for some, perhaps give it a try...?
But I wouldn't start worrying till we see what's up. Copy-n-paste the troubleshooting form here, and fill-in the info. (the link is in my signature)