Where is swamp sunflower native?
Where is swamp sunflower native?
Helianthus angustifolius is a species of sunflower known by the common name narrowleaf sunflower or swamp sunflower. It is native to the south-central and eastern United States, found in all the coastal states from Texas to Long Island, and inland as far as Missouri.
Is swamp sunflower invasive?
This plant is a threatened plant in native areas in New York and Illinois. Warning: In ideal conditions (full sun, rich soil and enough water), swamp sunflower may spread by underground rhizomes and be potentially invasive.
Does swamp sunflower spread?
Although swamp sunflower tolerates boggy soil, it spreads rapidly when grown in moist, well-drained soil. The plant tolerates light shade but prefers full sunlight. Too much shade may result in a weak, leggy plant with few blooms. Provide plenty of space; each plant can spread to a width of 4 to 5 feet.
Are swamp sunflowers perennials?
The last sunflower to bloom, Helianthus angustifolius (Swamp Sunflower) is a showy perennial forming a clump of tall and sturdy, green to purplish pubescent stems.
How long do swamp sunflowers last?
Flowering begins in September or October and continues until frost. The starry daisies are particularly striking against the intense blue October sky. Golden brown seed clusters follow and remain into winter to feed the birds. Plants grow 5-7′ and up to 10′ tall with 4-6′ or greater spread.
What is swamp sunflower?
Swamp sunflower is a native perennial member of the aster family and can be found from NY to FL to TX. It is a large perennial that can grow up to 8 feet tall with showy yellow daisy-like flowers from mid to late summer into fall.
Do you cut back swamp sunflowers?
Wait until your swamp sunflowers grow to 4 feet tall and then cut them down to 2 feet. This will probably limit their ultimate height to 6-7 feet, but if that’s too tall, cut them back again. Cut them back no later than July, though, so they have time to form lots of flower buds.
Do deer eat swamp sunflowers?
Swamp sunflower is not known to be toxic, and in nature is readily eaten by deer and birds.
Do sunflowers like wet soil?
Sunflowers also withstand wet, humid weather, although well-draining soil or containers are essential in such climates.
Can you eat swamp sunflowers?
Swamp sunflower seeds are edible, although they are not as large and easy to eat as those of the common sunflower, helianthus annuus.
How do you grow Helianthus Angustifolius?
CULTURAL & MAINTENANCE NEEDS: Helianthus angustifolius is easy to grow in sunny sites with acidic moist or wet soil. Plants thrive in well drained loamy or clay soils. They tolerate some salt and a bit of drought after establishment. Avoid fertilization as this leads to stem weakness.
How do you plant Helianthus Angustifolius?
