put in an osolating fan on low so they get a gental brease. then as they get biger increase the brease don't turn the fan on high. till they are older. when you put the fan on them watch them to see how they handle the brease if it looks like its too much move the fan farther away or lower the fan speed the stems will thicken as they grow. gl on your grow may you be cursed with many buds.