I agree with weedmaster - some strains will get brownish hairs early, but that's just the maturity of the buds starting. You'll often see round after round of white hairs while the initial ones turn brownish. You need to get a 30x scope and take a look at the trichs to find out exactly how close they are to completion - weedmaster's guide to the clear/cloudy/amber trich heads is right on... good luck! Remember too - big buds don't always mean better quality buds... some excellent weed comes in smaller bud sizes too!