Butterfly Weed vs Fountain Grass

Side-by-side plant comparison — which is right for your garden?

Butterfly Weed

Asclepias tuberosa

Apocynaceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Fountain Grass

Pennisetum alopecuroides

Poaceae · grasses

Deer ResistantDrought TolerantLow Maintenance

Hardiness Zone Range

Butterfly Weed (Zones 3-9)

Fountain Grass (Zones 5-9)

Overlap: Both grow in zones 5–9

Detailed Comparison

Feature	Butterfly Weed	Fountain Grass
Scientific Name	Asclepias tuberosa	Pennisetum alopecuroides
Family	Apocynaceae	Poaceae
Category	flowers	grasses
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧 Low	💧💧 Medium
Soil	Well-drained, Sandy	Well-drained
Height	2' 6"	4'
Spread	1' 6"	3'
Bloom Season	Summer	Summer-Fall
Bloom Color	Orange	Pink, Tan
Growth Rate	Medium	Fast
Native Region	Eastern North America	East Asia, Australia
Maintenance	Low	Low

Special Traits

Butterfly Weed

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Fountain Grass

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Care Tips

Butterfly Weed

✓Deep taproot — don't transplant.
✓Direct sow or plant young.
✓Late to emerge in spring — mark location.
✓Monarch caterpillar host plant.

Fountain Grass

✓Cut back to 6 inches in late winter before new growth.
✓Divide every 3-4 years.
✓Leave seed heads for winter interest.
✓Drought tolerant once established.

Which Plant Is Right for Your Garden?

Choose Butterfly Weed if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 3–9.

Choose Fountain Grass if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 5–9.

Plant them together? Both overlap in zones 5–9. They share similar sun requirements (full sun), making them potential garden companions.

View Butterfly WeedProfile →View Fountain GrassProfile →

Frequently Asked Questions

Can Butterfly Weed and Fountain Grass grow in the same hardiness zone?

Butterfly Weed grows in USDA zones 3-9, while Fountain Grass grows in zones 5-9. Both plants can grow together in zones 5 through 9.

Do Butterfly Weed and Fountain Grass have the same sun and water needs?

Butterfly Weed needs full sun and low water, while Fountain Grass needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Butterfly Weed or Fountain Grass?

Fountain Grass grows taller at 4' compared to Butterfly Weed at 2' 6". Fountain Grass spreads 3' while Butterfly Weed spreads 1' 6".

Are Butterfly Weed and Fountain Grass deer resistant?

Yes, both Butterfly Weed and Fountain Grass are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Butterfly Weed or Fountain Grass?

Both Butterfly Weed and Fountain Grass have low maintenance requirements. They need a similar level of care including regular attention to watering, pruning, and soil health.

Explore More Data Tools

For adjacent public-data tools, methodology notes, and network updates, visit DataPeek Facts.

Detailed Comparison

Feature	Butterfly Weed	Fountain Grass
Scientific Name	Asclepias tuberosa	Pennisetum alopecuroides
Family	Apocynaceae	Poaceae
Category	flowers	grasses
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧 Low	💧💧 Medium
Soil	Well-drained, Sandy	Well-drained
Height	2' 6"	4'
Spread	1' 6"	3'
Bloom Season	Summer	Summer-Fall
Bloom Color	Orange	Pink, Tan
Growth Rate	Medium	Fast
Native Region	Eastern North America	East Asia, Australia
Maintenance	Low	Low

Care Tips

Butterfly Weed

✓Deep taproot — don't transplant.
✓Direct sow or plant young.
✓Late to emerge in spring — mark location.
✓Monarch caterpillar host plant.

Fountain Grass

✓Cut back to 6 inches in late winter before new growth.
✓Divide every 3-4 years.
✓Leave seed heads for winter interest.
✓Drought tolerant once established.

Which Plant Is Right for Your Garden?

Choose Butterfly Weed if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 3–9.

Choose Fountain Grass if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 5–9.

Plant them together? Both overlap in zones 5–9. They share similar sun requirements (full sun), making them potential garden companions.

Frequently Asked Questions

Can Butterfly Weed and Fountain Grass grow in the same hardiness zone?

Butterfly Weed grows in USDA zones 3-9, while Fountain Grass grows in zones 5-9. Both plants can grow together in zones 5 through 9.

Do Butterfly Weed and Fountain Grass have the same sun and water needs?

Butterfly Weed needs full sun and low water, while Fountain Grass needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Butterfly Weed or Fountain Grass?

Fountain Grass grows taller at 4' compared to Butterfly Weed at 2' 6". Fountain Grass spreads 3' while Butterfly Weed spreads 1' 6".

Are Butterfly Weed and Fountain Grass deer resistant?

Yes, both Butterfly Weed and Fountain Grass are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Butterfly Weed or Fountain Grass?

Both Butterfly Weed and Fountain Grass have low maintenance requirements. They need a similar level of care including regular attention to watering, pruning, and soil health.