Species rosinweed

rosinweed

Silphium integrifolium

Rosinweed (Silphium integrifolium) is a hardy North American wildflower with bright yellow blooms. It produces clusters of showy flowers in the summer months that attract butterflies. The plant grows to a profuse height of 4-7 ft, with a central stalk that extends upward, and thick, lanceolate leaves that are arranged in an alternating pattern down its stem. It is native to prairies and meadows and is tolerant of a wide range of conditions, making it an attractive addition to gardens. It is also deer-resistant and provides excellent cut flowers for floral arrangements.

Cycle:

Herbaceous Perennial

Watering:

Average

Propagation:

Seed Propagation,Division,Cutting,Layering Propagation

Hardiness Zone:

4 - 8

Flowers:

Yellow Flowers

Sun:

Full sun

Leaf:

Yes

Leaf Color:

green

Growth Rate:

Low

Maintenance:

Low

Drought Tolerant:

Yes

Salt Tolerant:

Yes

Thorny:

Yes

Care Level:

Medium

watering

Water rosinweed plants every 5-7 days in the spring and summer and every 10-14 days in the fall and winter. When watering, make sure to provide 1-2 inches of water to the soil around each plant, as rosinweeds prefer moist but not soggy soil conditions. Rosinweed plants should not be overwatered and should always be allowed to dry out between watering.

sunlight

Rosinweed (Silphium integrifolium) is a native wildflower which grows best in a sunny location. It should have at least 3 to 4 hours of direct sunlight per day, preferably during the early morning hours. This sun exposure will help this plant reach its full flower potential, with an array of bright yellow blossoms indicating it's flourishing health. Too much sunlight can be harmful, so avoiding peak sun hours (10 am to 2 pm) is recommended. Additionally, Rosinweed should be well-watered in the spring and fall for optimal growth.

pruning

Pruning rosinweed (Silphium integrifolium) should be done annually in the late winter or early spring. It is important to prune the plant before it begins to burst into new growth. As with all pruning, it is good to remove any dead, damaged or diseased branches. When pruning rosinweed, it's best to remove no more than 1/3 of the total stem mass. This will ensure the plant has plenty of nutrients and energy for the new growth, while still leaving enough of the structure to support the entire canopy. Taking too much will weaken the plant and reduce its ability to repel pests and disease.

Season

Fall
Winter
Spring
Summer
Sep
Oct
Nov
Dec
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Starts Flowering

Rosinweed typically starts flowering in June.

Hardiness Map