Scientific name: Stellaria media
Seldom necessary to plant as chickweed self- seed themselves freely especially in dry weather. Used as an astringent and anti-rheumatic, heals wounds, eases arthritis and pains of the joints, cuts, inflammations and skin irritations. It may soothe severe itchiness and is often used to relieve eczema, varicose veins and nettle rash.
This is a photo from the Wikimedia Commons.