Seeds sprout in about 3 days.
Chia thrives in impoverished soil and once established it needs very little water and care apart from a little weeding.
The plants grow to about 1 metre tall with sturdy square stems and large attractive leaves. After the sage like flowers have set in Autumn, the seed can be harvested.
As a snack substitute for those who like to 'nibble' but are trying to watch their weight, Chia is wonderful.

Oat straw is rich in silica and an excellent substitute for Horsetail if you live, as we do, in an area where Equisetum arvense is not permitted.
We use the seed as a cholesterol reducing porridge or ground up and used in a muslin bag in the bath to soothe irritated skin, or just for the delight of the bath tub.
These guys are fantastic for sprouts.
Another very easily achieved live 'Green' that requires little maintenance and just a regular haicut. Planted in one of those small plastic covered germinators that are available at most hardware suppliers, these can be grown on the kitchen bench at any time during the year. Enough in one order to fill a typical germinator.