The green seeds of Oat (Avena sativa) can be harvested in their milky stage to make a medicinal tincture. The milky stage of the seeds can be easily missed so the right time of harvest ist crucial.
To test if the oat-seeds are in the milky stage just compress it between your fingernails. The seeds can be easily stripped from the stalk by hand.
Afterwards they are put in a blender and then combined in a 1:2 ratio with 75 % alcohol and 25 % water mixture. We harvested 300 g of oat seeds so we added 450 ml of alcohol and 150 ml of water.
"Oat seed is a gentle nervine tonic for treating exhaustion, sleeplessness, adrenal burnout, or addiction to nicotine, caffeine or other drugs. The herb is also a servicable diuretic." - Making plant medicine by Richo Cech
The seeds can also be used fresh or dried in teas or decotions.