Good to use Johnson's baby powder below 12 months baby in summer season? or suggest any other powder.

No! Especially NOT under 12 mos. I took Baby Basics while pregnant and was taught how powder, baby powder had been the lone culprit in SIDS situations. Little babies lungs aren't able to hock up thickness and when they breathe in the powder from the air it Creates a paste like substance in their bronchial tubes making their breathing more shallow and they either die from not enough oxygen to the brain or suffocation. DON'T USE BABY POWDER! just change their diapers frequently and use preventative rash creams like Butt Paste or any zinc products to keep moisture rolling into the diaper instead of against the skin.