Greater Celandine (Chelidonium Majus) - it's annual self-seeding herbal plant, grows 2-4 feet tall, blooms May to September with small yellow flowers.
Chelidonium ("Чистотел" in Russian) is very powerful herb. Mostly used part of plant is bright yellow juice that "bleeds" when stem is crunched. The juice is used to treat various skin conditions, it "cleanses the body" of warts, acne and non-healing wounds.
It also has other medicinal uses such as anesthetic, anti-bacterial, anti-fungal and more. Read here about Properties, Use and Treatment of Chelidonium.
Requires no maintenance, even though it's annual plant, but once seeded in one spot will keep reseeding itself year after year, Plant looks very bright and vivid the whole summer, nice addition to your herb garden.
1 packet contains approx 100 seeds.