Light Needs
Mature Height
Mature Spread
Growing Zones
Rattlesnake Master or Eryngium yuccifolium is a unique perennial with stunning foliage and flowers. The tiny, thistle-like blooms add tremendous texture and architectural interest. Enjoy the globe-like, greenish-white flowers from May through August. In full bloom, the round flowers emerge from well-branched stems, resembling a bustling solar system. Blue-green, lance-shaped basal foliage gently arches around the base of the plant.
This is a clump-forming perennial native to prairies. As a native plant, Rattlesnake Master does well with minimal care and thrives in somewhat challenging conditions. Use this plant as a specimen or add it to beds and borders where it works well near the back of a group planting. Grow this plant as a perennial in zones 4 through 9.
Rattlesnake Master Care
Full sun and moist, well-draining soil will best support Rattlesnake Master. Use average or low-quality soil because too much organic content can cause growth to become leggy. Water during an extended dry spell.
Deadhead the plant if you don’t want it to self-seed. The plant provides color and visual interest during the winter, but it can set seed if the flowers are left in place. Trim the growth in fall or early spring, depending on your preference.
Rattlesnake Master Spacing
The Rattlesnake Master stands 3 to 5 feet tall and 1 to 2 feet wide. Space plants 2 feet apart when creating a continuous planting.
Rattlesnake Master Information
| USDA Hardiness Zones: 4 - 9 |
| Plant Type: |
| Light Exposure: Full Sun (At Least 6 Hours Of Direct Sunlight) |
| Mature Height: 3 - 5 Feet |
| Mature Spread: 12 - 24 Inches |
| Spacing: 12 - 24 Inches |
| Habit: Clumping, Mounded |
| Flower Color(s): Green, White |
| Flower Description: Green and White Shades |
| Bloom Period: Summer |
| Foliage Type: Herbaceous |
| Foliage Color(s): Green |
| Foliage Description: Green Shades |
| Seasonal Interest: Summer Flowering |
| Watering: Average |
| Resists: N/A |
| Tolerates: Drought |
| Attracts: Butterflies |
| Container Role: |
| Uses: Borders, Wildlife Gardens |
| Features: N/A |
| Brand: |
| Common Name: Rattlesnake Master |
| Other Name(s): Beargrass, Button Eryngo |
| Scientific Name: Eryngium yuccifolium |
Simple Plant Spacing Calculator
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
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We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2026 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!