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Pure Air Natives
Silphium integrifolium

Rosinweed

Seeds

Packet $3.00

Description

Rosinweed (Silphium integrifolium) is a bold native perennial known for its thick, lance-shaped leaves and bright yellow, sunflower-like blooms. Standing 2 to 6 feet tall, it thrives in open meadows, prairies, and pollinator gardens—offering structure, color, and vital nectar for bees, butterflies, and other pollinators.

This low-maintenance wildflower prefers full sun and well-drained, loamy soil, but it’s adaptable to a range of conditions. Its deep roots help it withstand drought, making it a resilient choice for native landscaping and prairie restoration.

Rosinweed is ideal for gardeners looking to support local wildlife while adding long-lasting color and texture to their landscape.

Seed Details

Weight 0.025 lbs
Dimensions 3.5 × 0.1 × 2.25 in
Kind

Seeds

Items - Seeds

Germination Code

Sociability

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Sun Requirements

Soil Moisture

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Height

USDA Zones

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Bloom Colors

Bloom Period

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Plant Spacing

Range Map

Rosinweed native range

Details

Seeds/Packet75
Germination Code60 Day Cold Moist Stratification
SociabilityColonies, Rhizomes, Self-Seeding, Slow Grower
Sun RequirementsFull Sun
Soil MoistureDry, Dry Mesic, Mesic, Wet-Mesic
BenefitsBees, Butterflies, Deer Resistant, Pollinators
Height4-5'
USDA Zones4, 5, 6, 7, 8
Bloom ColorYellow
Bloom PeriodJuly, August, September
Plant Spacing18-24"

Seeds & Seed Mixes:

Seeds and seed mixes ship nationwide, year-round, typically within 3–5 business days. If you would like to postpone a seed mix shipment until fall, please note this at checkout.

Live Plants:

Live plants are available year-round while inventory lasts and ship to all states except California, Arizona, Oregon, Washington, Nevada, Alaska, and Hawaii. After your order is placed, we’ll contact you to coordinate a spring shipping window, as many plants are overwintered and ship once dormancy breaks.

Estimated shipping for 2026 plant orders begins in mid-April, weather permitting.

If you’re looking to secure plants in advance or need larger quantities for a project, we offer contract growing options. Contact us to discuss your needs and request a quote. Additional species not listed online may also be available through contract grow.

Live Stakes:

Live stakes are available by request only and must be ordered by submitting a contact form. Ordering is open seasonally from November 1 through February 28. A minimum of 100 stakes per order is required, with at least 25 stakes per species.

Live stakes ship only to the following states: Missouri, Minnesota, South Dakota, North Dakota, Nebraska, Kansas, Oklahoma, Arkansas, Tennessee, Kentucky, Illinois, Indiana, Ohio, Michigan, and Iowa.

PLS stands for Pure Live Seed, an industry-standard measure of seed quality. It reflects the portion of seed in a batch that is viable and capable of germinating.

What this means for you: when you purchase 1 lb. of PLS seed, the physical weight of the seed you receive will be slightly more than 1 lb. That’s because we account for non-viable seed and natural inert material upfront, so you receive a full pound of live, plantable seed.

Many companies sell bulk seed by total weight, which can include filler and non-viable seed. By pricing based on PLS, we make sure you’re getting exactly what you paid for—high-quality native seed with more predictable, successful germination.

Want to dive deeper? Check out our in-depth article on what PLS is and why it matters.