In our family we r not allowed and the season is not good for it u might catch cold 

don't apply because its rainy season .u my caught cold ncoj heena ki thseer thdi hoti h

my mil is not allowing me to apply heena on hairs..she said the colour of heena will be on baby's body after birth if u will apply..another myth..pissed off

you can apply but you might catch cold.be careful

I too apply Henna every month to nourish my hair but I heard the henna powder we use is mixed with chemicals, so even im confused. If fresh henna leaves are available grind it and use it, you can add coffee powder or tea to enhance colour.