Silphium perfoliatum
This perennial species grows up to 3 m tall and produces large leaves grouped in pairs and sheathing the stem, as well as an abundance of yellow flowers with 18 to 40 petals.
The abundant seeds attract many garden birds.
Its English name "Cup plant" derives from the position of the leaves surrounding the stem like a cup, collecting rainwater. Birds, insects and even amphibians come to drink from this little water reservoir in summer.
in bucket
Perennial seeds require a wintering period for germination. Place them in the fridge for 60 days before sowing in spring. Sow in trays, making sure the seeds are lightly covered, as they germinate in the light. When the plants have 5 to 6 leaves, transplant into individual cups or directly into warmed soil. Autumn seedlings are sown in the same way and left outdoors until spring.
They reseed spontaneously.
January, February, March, April, October, November, December
July, August, September
in the ground, in pot
semi-shade, sunny
medium
clayey, sandy, humus
drained, sec, fees
Silphium perfoliatum
mid-season
60 seeds
Yellow
From 250 to 300 cm
From 10 to 15 cm
pointed
North America
