That's a rough one. Ya didn't say what strain you're using, or if they're cakes or casing, but 4-5 inches sounds like the veil is about to tear any minute. Ya might pick those, humidify the shit outta the rest, give 'em a little more heat and look in again tomorrow. I've blown away by the growth I've seen in a 12 hr period.

I was having slow growth, the shrooms pointing down, mycelial fuzz on the stems, etc. After reading up here at the shroomery, I misted the cakes directly, put books against the side of the terrarium (to keep in warmth, and only let light in from the top) and BLAMMO! Fucking see 'em grow right before your eyes.

'splode

------------------
"Of all the things ive lost i miss my mind the most."

keep it darker longer (like 2-4 hours light, 22-20 hours dark) that will help increase growth quick...

I wouldnt spray the casing while their are fruits growing, but misting the shit out of the sides of the terrarium will help....