You can sow meadowsweet in either the spring or fall, in a sunny to partially shady location. You will want to find rich, moist, well drained soil. Make sure there is no chance of frost coming soon after planting.
Sow the seeds of meadowsweet right on the surface , firm it in lightly with palm, and leave uncovered. Keep it moist.
If you want an earlier harvest, you can sow the seeds indoor 6-8 weeks before the last frost in your area.
Meadowsweet is a perennial, so you can enjoy it year after year after it is established. You can harvest leaves as needed and flowering tops when the plants bloom.