bud hairs wont turn brown

10 weeks in g13 600hps huge colas hardly any trichs almost no brown hairs

forgot to mention only affecting 2 outta 12 plants rest appear to be done

Could be genetics if the others are fine.

Are these plants from seeds. If they are different strains they can easily have different needs. And even if they are from the same strain,each different plant from a different seed can show a broad range of differences. This is why people will grow like 8 plants of a strain and make a clone from the best one to be a Mother. Info would really help. A Photo would ber great also.

perhaps the lack of crystals could be to low sweetness in the soil. molasses or the bottle of stuff called sweet, seaweed, kelp, all help with crystal production