How Long Does It Take to Grow Salt Crystals?

How Long Does It Take to Grow Salt Crystals?

Depending on the method used to grow salt crystals, formation of crystals occurs within several hours or a couple of days. Both methods require boiling hot water to melt the salt.

For smaller crystals that form in a matter of hours, soak cardboard in the hot saltwater mixture. Once soaked, place the cardboard in a dry sunny location. Small crystals form in just a few hours.

A large crystal forms when the cooled saltwater solution gets a seed crystal added to it. This seed crystal dangles in the solution from a pencil or other level object. Place it in a cool and shaded area. The large crystal forms in a few days.