Honesty, or silver dollar plant, is a breeze to grow and brings you lovely flowers come spring.
Key Honesty facts:
Name: Lunaria annua
Family : Brassicaceae
Type: biennial
Height: 20 to 31.5 inches (50 to 80 cm)
Exposure: sunny to partial shade
Soil: rich, well-drained
Foliage: deciduous – Blooming: spring
If you bought your silver-dollar in a pot, plant it in the spring or at summer’s end.
Honesty likes partially sunny spots, with partial shade being ideal.For sowing, prefer a sowing in a nursery in the spring and transplant at summer’s end or the following spring. You can directly sow in the ground from June to September.
Gather the seeds of this plant when seed capsules become transparent. Simply store them in an envelope and sow them the next year.

If you truly wish to pamper it, remove faded flowers gradually.
In fall, leave some coins in place for the plant to self-sow.

Its Latin name Lunaria annua translates literally as annual moon, likely due to its lovely moon-shaped pearly coins. It is also often found under the name of coin-plant.
Note that there is also another variety of honesty called Lunaria rediviva.
→ To go further: Lunaria: its fruits are dazzling
For successful sowing, it’s key to weed progressively and water to maintain a certain level of humidity.