Black-Eyed Susan vs Colorado Blue Spruce

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

Black-Eyed Susan

Rudbeckia hirta

Asteraceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Colorado Blue Spruce

Picea pungens

Pinaceae · trees

Deer ResistantDrought TolerantLow Maintenance

Hardiness Zone Range

Black-Eyed Susan (Zones 3-9)

Colorado Blue Spruce (Zones 2-7)

Overlap: Both grow in zones 3–7

Detailed Comparison

Feature	Black-Eyed Susan	Colorado Blue Spruce
Scientific Name	Rudbeckia hirta	Picea pungens
Family	Asteraceae	Pinaceae
Category	flowers	trees
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	3'	60'
Spread	1' 6"	20'
Bloom Season	Summer-Fall	Spring
Bloom Color	Yellow	Green
Growth Rate	Fast	Slow
Native Region	Eastern North America	Rocky Mountains
Maintenance	Low	Low

Special Traits

Black-Eyed Susan

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Colorado Blue Spruce

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Care Tips

Black-Eyed Susan

✓Deadhead spent blooms to encourage reblooming.
✓Divide clumps every 3-4 years.
✓Tolerates poor soil and drought once established.

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 Black-Eyed Susan if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with medium water in zones 3–9.

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 3–7. They share similar sun requirements (full sun), making them potential garden companions.

View Black-Eyed SusanProfile →View Colorado Blue SpruceProfile →

Frequently Asked Questions

Can Black-Eyed Susan and Colorado Blue Spruce grow in the same hardiness zone?

Black-Eyed Susan grows in USDA zones 3-9, while Colorado Blue Spruce grows in zones 2-7. Both plants can grow together in zones 3 through 7.

Do Black-Eyed Susan and Colorado Blue Spruce have the same sun and water needs?

Black-Eyed Susan needs full sun and medium water, while Colorado Blue Spruce needs full sun and medium water. They share similar growing requirements and can be planted in the same bed.

Which grows taller, Black-Eyed Susan or Colorado Blue Spruce?

Colorado Blue Spruce grows taller at 60' compared to Black-Eyed Susan at 3'. Colorado Blue Spruce spreads 20' while Black-Eyed Susan spreads 1' 6".

Are Black-Eyed Susan and Colorado Blue Spruce deer resistant?

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

Which is easier to maintain, Black-Eyed Susan or Colorado Blue Spruce?

Both Black-Eyed Susan 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	Black-Eyed Susan	Colorado Blue Spruce
Scientific Name	Rudbeckia hirta	Picea pungens
Family	Asteraceae	Pinaceae
Category	flowers	trees
Sun	☀️ Full Sun	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Well-drained	Well-drained
Height	3'	60'
Spread	1' 6"	20'
Bloom Season	Summer-Fall	Spring
Bloom Color	Yellow	Green
Growth Rate	Fast	Slow
Native Region	Eastern North America	Rocky Mountains
Maintenance	Low	Low

Care Tips

Black-Eyed Susan

✓Deadhead spent blooms to encourage reblooming.
✓Divide clumps every 3-4 years.
✓Tolerates poor soil and drought once established.

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.