Is sweet woodruff annual or perennial?

Flower: Showy, Fragrant, Good Dried

Lot more interesting detail can be read here. Consequently, how quickly does sweet woodruff spread?

It grows in USDA Zones 4-8. Sweet woodruff spreads by runners. In moist soil, it can spread very quickly and can become invasive in the right conditions. You can also keep sweet woodruff under control by spade edging around the bed yearly.

Beside above, is sweet woodruff poisonous? Although a tea of the wilted or dried leaves is still used as a gentle tranquilizer, large quantities can cause dizziness and vomiting. The U.S. Food and Drug Administration considers sweet woodruff safe only in alcoholic beverages.

Similarly one may ask, what does sweet woodruff look like?

Sweet woodruff (Galium odoratum) is a creeping, mat-forming perennial that is commonly used as a ground cover in shady areas. It bears pretty clusters of white, star-shaped flowers in the spring and has very fragrant, lance-shaped, dark green leaves.

How do you harvest sweet woodruff?

For best fragrance, sweet woodruff leaves should be harvested right after the plants have bloomed. Cut the branches and tie them in bunches. Hang the bunches in a dark, cool, dry spot to dry.