Astilbe vs Colorado Blue Spruce

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

Astilbe

Astilbe × arendsii

Saxifragaceae · flowers

Deer ResistantLow Maintenance

Colorado Blue Spruce

Picea pungens

Pinaceae · trees

Deer ResistantDrought TolerantLow Maintenance

Hardiness Zone Range

Astilbe (Zones 4-8)

Colorado Blue Spruce (Zones 2-7)

Overlap: Both grow in zones 4–7

Detailed Comparison

Feature	Astilbe	Colorado Blue Spruce
Scientific Name	Astilbe × arendsii	Picea pungens
Family	Saxifragaceae	Pinaceae
Category	flowers	trees
Sun	⛅ Part Shade	☀️ Full Sun
Water	💧💧 Medium to High	💧💧 Medium
Soil	Rich, Moist	Well-drained
Height	3'	60'
Spread	2'	20'
Bloom Season	Summer	Spring
Bloom Color	Red, Pink, White, Purple	Green
Growth Rate	Medium	Slow
Native Region	East Asia	Rocky Mountains
Maintenance	Low	Low

Special Traits

Astilbe

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Colorado Blue Spruce

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.

Colorado Blue Spruce

✓Needs full sun for best blue color.
✓Maintain lower branches for best appearance.
✓Watch for cytospora canker and spider mites.
✓Mulch well.

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 Colorado Blue Spruce if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 2–7.

Plant them together? Both overlap in zones 4–7. However, they have different sun needs, so plan your garden layout carefully.

View AstilbeProfile →View Colorado Blue SpruceProfile →

Frequently Asked Questions

Can Astilbe and Colorado Blue Spruce grow in the same hardiness zone?

Astilbe grows in USDA zones 4-8, while Colorado Blue Spruce grows in zones 2-7. Both plants can grow together in zones 4 through 7.

Do Astilbe and Colorado Blue Spruce have the same sun and water needs?

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

Which grows taller, Astilbe or Colorado Blue Spruce?

Colorado Blue Spruce grows taller at 60' compared to Astilbe at 3'. Colorado Blue Spruce spreads 20' while Astilbe spreads 2'.

Are Astilbe and Colorado Blue Spruce deer resistant?

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

Which is easier to maintain, Astilbe or Colorado Blue Spruce?

Both Astilbe and Colorado Blue Spruce 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	Colorado Blue Spruce
Scientific Name	Astilbe × arendsii	Picea pungens
Family	Saxifragaceae	Pinaceae
Category	flowers	trees
Sun	⛅ Part Shade	☀️ Full Sun
Water	💧💧 Medium to High	💧💧 Medium
Soil	Rich, Moist	Well-drained
Height	3'	60'
Spread	2'	20'
Bloom Season	Summer	Spring
Bloom Color	Red, Pink, White, Purple	Green
Growth Rate	Medium	Slow
Native Region	East Asia	Rocky Mountains
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.

Colorado Blue Spruce

✓Needs full sun for best blue color.
✓Maintain lower branches for best appearance.
✓Watch for cytospora canker and spider mites.
✓Mulch well.

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 Colorado Blue Spruce if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 2–7.

Plant them together? Both overlap in zones 4–7. However, they have different sun needs, so plan your garden layout carefully.

Frequently Asked Questions

Can Astilbe and Colorado Blue Spruce grow in the same hardiness zone?

Astilbe grows in USDA zones 4-8, while Colorado Blue Spruce grows in zones 2-7. Both plants can grow together in zones 4 through 7.

Do Astilbe and Colorado Blue Spruce have the same sun and water needs?

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

Which grows taller, Astilbe or Colorado Blue Spruce?

Colorado Blue Spruce grows taller at 60' compared to Astilbe at 3'. Colorado Blue Spruce spreads 20' while Astilbe spreads 2'.

Are Astilbe and Colorado Blue Spruce deer resistant?

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

Which is easier to maintain, Astilbe or Colorado Blue Spruce?

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