Astilbe vs Hydrangea

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

Astilbe

Astilbe × arendsii

Saxifragaceae · flowers

Deer ResistantLow Maintenance

Hydrangea

Hydrangea macrophylla

Hydrangeaceae · flowers

Deer ResistantMedium Maintenance

Hardiness Zone Range

Astilbe (Zones 4-8)

Hydrangea (Zones 5-9)

Overlap: Both grow in zones 5–8

Detailed Comparison

Feature	Astilbe	Hydrangea
Scientific Name	Astilbe × arendsii	Hydrangea macrophylla
Family	Saxifragaceae	Hydrangeaceae
Category	flowers	flowers
Sun	⛅ Part Shade	⛅ Part Shade
Water	💧💧 Medium to High	💧💧 Medium to High
Soil	Rich, Moist	Rich, Moist
Height	3'	6'
Spread	2'	6'
Bloom Season	Summer	Summer
Bloom Color	Red, Pink, White, Purple	Blue, Pink, White
Growth Rate	Medium	Medium
Native Region	East Asia	Japan
Maintenance	Low	Medium

Special Traits

Astilbe

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Hydrangea

No — EdibleYes — Deer ResistantNo — 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.

Hydrangea

✓Prune after flowering on old wood varieties.
✓Add aluminum sulfate for blue flowers, lime for pink.
✓Protect from afternoon sun in hot climates.

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 Hydrangea if you don't mind medium maintenance, and want deer resistance. It thrives in part shade with medium to high water in zones 5–9.

Plant them together? Both overlap in zones 5–8. They share similar sun requirements (part shade), making them potential garden companions.

View AstilbeProfile →View HydrangeaProfile →

Frequently Asked Questions

Can Astilbe and Hydrangea grow in the same hardiness zone?

Astilbe grows in USDA zones 4-8, while Hydrangea grows in zones 5-9. Both plants can grow together in zones 5 through 8.

Do Astilbe and Hydrangea have the same sun and water needs?

Astilbe needs part shade and medium to high water, while Hydrangea needs part shade and medium to high water. They share similar growing requirements and can be planted in the same bed.

Which grows taller, Astilbe or Hydrangea?

Hydrangea grows taller at 6' compared to Astilbe at 3'. Hydrangea spreads 6' while Astilbe spreads 2'.

Are Astilbe and Hydrangea deer resistant?

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

Which is easier to maintain, Astilbe or Hydrangea?

Astilbe has low maintenance while Hydrangea has medium maintenance. Astilbe may be easier for beginning gardeners to manage.

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Detailed Comparison

Feature	Astilbe	Hydrangea
Scientific Name	Astilbe × arendsii	Hydrangea macrophylla
Family	Saxifragaceae	Hydrangeaceae
Category	flowers	flowers
Sun	⛅ Part Shade	⛅ Part Shade
Water	💧💧 Medium to High	💧💧 Medium to High
Soil	Rich, Moist	Rich, Moist
Height	3'	6'
Spread	2'	6'
Bloom Season	Summer	Summer
Bloom Color	Red, Pink, White, Purple	Blue, Pink, White
Growth Rate	Medium	Medium
Native Region	East Asia	Japan
Maintenance	Low	Medium

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.

Hydrangea

✓Prune after flowering on old wood varieties.
✓Add aluminum sulfate for blue flowers, lime for pink.
✓Protect from afternoon sun in hot climates.

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 Hydrangea if you don't mind medium maintenance, and want deer resistance. It thrives in part shade with medium to high water in zones 5–9.

Plant them together? Both overlap in zones 5–8. They share similar sun requirements (part shade), making them potential garden companions.

Frequently Asked Questions

Can Astilbe and Hydrangea grow in the same hardiness zone?

Astilbe grows in USDA zones 4-8, while Hydrangea grows in zones 5-9. Both plants can grow together in zones 5 through 8.

Do Astilbe and Hydrangea have the same sun and water needs?

Astilbe needs part shade and medium to high water, while Hydrangea needs part shade and medium to high water. They share similar growing requirements and can be planted in the same bed.

Which grows taller, Astilbe or Hydrangea?

Hydrangea grows taller at 6' compared to Astilbe at 3'. Hydrangea spreads 6' while Astilbe spreads 2'.

Are Astilbe and Hydrangea deer resistant?

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

Which is easier to maintain, Astilbe or Hydrangea?

Astilbe has low maintenance while Hydrangea has medium maintenance. Astilbe may be easier for beginning gardeners to manage.