Astilbe vs Butterfly Weed

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

Astilbe

Astilbe × arendsii

Saxifragaceae · flowers

Deer ResistantLow Maintenance

Butterfly Weed

Asclepias tuberosa

Apocynaceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Hardiness Zone Range

Astilbe (Zones 4-8)

Butterfly Weed (Zones 3-9)

Overlap: Both grow in zones 4–8

Detailed Comparison

Feature	Astilbe	Butterfly Weed
Scientific Name	Astilbe × arendsii	Asclepias tuberosa
Family	Saxifragaceae	Apocynaceae
Category	flowers	flowers
Sun	⛅ Part Shade	☀️ Full Sun
Water	💧💧 Medium to High	💧 Low
Soil	Rich, Moist	Well-drained, Sandy
Height	3'	2' 6"
Spread	2'	1' 6"
Bloom Season	Summer	Summer
Bloom Color	Red, Pink, White, Purple	Orange
Growth Rate	Medium	Medium
Native Region	East Asia	Eastern North America
Maintenance	Low	Low

Special Traits

Astilbe

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Butterfly Weed

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Care Tips

Astilbe

✓Must have consistently moist soil — wilts quickly if dry.
✓Divide every 3-4 years.
✓Leave dried flower heads for winter texture.
✓Feed in spring with balanced fertilizer.

Butterfly Weed

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

Which Plant Is Right for Your Garden?

Choose Astilbe if you want a low-maintenance plant, and want deer resistance. It thrives in part shade with medium to high water in zones 4–8.

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.

Plant them together? Both overlap in zones 4–8. However, they have different sun needs, so plan your garden layout carefully.

View AstilbeProfile →View Butterfly WeedProfile →

Frequently Asked Questions

Can Astilbe and Butterfly Weed grow in the same hardiness zone?

Astilbe grows in USDA zones 4-8, while Butterfly Weed grows in zones 3-9. Both plants can grow together in zones 4 through 8.

Do Astilbe and Butterfly Weed have the same sun and water needs?

Astilbe needs part shade and medium to high water, while Butterfly Weed needs full sun and low water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Astilbe or Butterfly Weed?

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

Are Astilbe and Butterfly Weed deer resistant?

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

Which is easier to maintain, Astilbe or Butterfly Weed?

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

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Detailed Comparison

Feature	Astilbe	Butterfly Weed
Scientific Name	Astilbe × arendsii	Asclepias tuberosa
Family	Saxifragaceae	Apocynaceae
Category	flowers	flowers
Sun	⛅ Part Shade	☀️ Full Sun
Water	💧💧 Medium to High	💧 Low
Soil	Rich, Moist	Well-drained, Sandy
Height	3'	2' 6"
Spread	2'	1' 6"
Bloom Season	Summer	Summer
Bloom Color	Red, Pink, White, Purple	Orange
Growth Rate	Medium	Medium
Native Region	East Asia	Eastern North America
Maintenance	Low	Low

Care Tips

Astilbe

✓Must have consistently moist soil — wilts quickly if dry.
✓Divide every 3-4 years.
✓Leave dried flower heads for winter texture.
✓Feed in spring with balanced fertilizer.

Butterfly Weed

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

Which Plant Is Right for Your Garden?

Choose Astilbe if you want a low-maintenance plant, and want deer resistance. It thrives in part shade with medium to high water in zones 4–8.

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.

Plant them together? Both overlap in zones 4–8. However, they have different sun needs, so plan your garden layout carefully.

Frequently Asked Questions

Can Astilbe and Butterfly Weed grow in the same hardiness zone?

Astilbe grows in USDA zones 4-8, while Butterfly Weed grows in zones 3-9. Both plants can grow together in zones 4 through 8.

Do Astilbe and Butterfly Weed have the same sun and water needs?

Astilbe needs part shade and medium to high water, while Butterfly Weed needs full sun and low water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Astilbe or Butterfly Weed?

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

Are Astilbe and Butterfly Weed deer resistant?

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

Which is easier to maintain, Astilbe or Butterfly Weed?

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