Cosmos vs Holly

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

Cosmos

Cosmos bipinnatus

Asteraceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Holly

Ilex opaca

Aquifoliaceae · shrubs

Deer ResistantLow Maintenance

Hardiness Zone Range

Cosmos (Zones 2-11)

Holly (Zones 5-9)

Overlap: Both grow in zones 5–9

Detailed Comparison

Feature	Cosmos	Holly
Scientific Name	Cosmos bipinnatus	Ilex opaca
Family	Asteraceae	Aquifoliaceae
Category	flowers	shrubs
Sun	☀️ Full Sun	☀️ Full Sun to Part Shade
Water	💧 Low	💧💧 Medium
Soil	Well-drained, Poor	Acidic, Well-drained
Height	5'	40'
Spread	2'	20'
Bloom Season	Summer-Fall	Spring
Bloom Color	Pink, White, Red	White
Growth Rate	Fast	Slow
Native Region	Mexico	Eastern North America
Maintenance	Low	Low

Special Traits

Cosmos

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Holly

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Cosmos

✓Direct sow after frost.
✓Don't fertilize — rich soil produces leaves not flowers.
✓Deadhead or let self-seed.
✓Tall varieties may need staking in wind.

Holly

✓Need both male and female plants for berries.
✓One male can pollinate 6-8 females.
✓Prune in winter for holiday decorations.
✓Tolerates heavy shading.

Which Plant Is Right for Your Garden?

Choose Cosmos if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 2–11.

Choose Holly if you want a low-maintenance plant, and want deer resistance. It thrives in full sun to part shade with medium water in zones 5–9.

Plant them together? Both overlap in zones 5–9. However, they have different sun needs, so plan your garden layout carefully.

View CosmosProfile →View HollyProfile →

Frequently Asked Questions

Can Cosmos and Holly grow in the same hardiness zone?

Cosmos grows in USDA zones 2-11, while Holly grows in zones 5-9. Both plants can grow together in zones 5 through 9.

Do Cosmos and Holly have the same sun and water needs?

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

Which grows taller, Cosmos or Holly?

Holly grows taller at 40' compared to Cosmos at 5'. Holly spreads 20' while Cosmos spreads 2'.

Are Cosmos and Holly deer resistant?

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

Which is easier to maintain, Cosmos or Holly?

Both Cosmos and Holly 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	Cosmos	Holly
Scientific Name	Cosmos bipinnatus	Ilex opaca
Family	Asteraceae	Aquifoliaceae
Category	flowers	shrubs
Sun	☀️ Full Sun	☀️ Full Sun to Part Shade
Water	💧 Low	💧💧 Medium
Soil	Well-drained, Poor	Acidic, Well-drained
Height	5'	40'
Spread	2'	20'
Bloom Season	Summer-Fall	Spring
Bloom Color	Pink, White, Red	White
Growth Rate	Fast	Slow
Native Region	Mexico	Eastern North America
Maintenance	Low	Low

Care Tips

Cosmos

✓Direct sow after frost.
✓Don't fertilize — rich soil produces leaves not flowers.
✓Deadhead or let self-seed.
✓Tall varieties may need staking in wind.

Holly

✓Need both male and female plants for berries.
✓One male can pollinate 6-8 females.
✓Prune in winter for holiday decorations.
✓Tolerates heavy shading.

Which Plant Is Right for Your Garden?

Choose Cosmos if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 2–11.

Choose Holly if you want a low-maintenance plant, and want deer resistance. It thrives in full sun to part shade with medium water in zones 5–9.

Plant them together? Both overlap in zones 5–9. However, they have different sun needs, so plan your garden layout carefully.

Frequently Asked Questions

Can Cosmos and Holly grow in the same hardiness zone?

Cosmos grows in USDA zones 2-11, while Holly grows in zones 5-9. Both plants can grow together in zones 5 through 9.

Do Cosmos and Holly have the same sun and water needs?

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

Which grows taller, Cosmos or Holly?

Holly grows taller at 40' compared to Cosmos at 5'. Holly spreads 20' while Cosmos spreads 2'.

Are Cosmos and Holly deer resistant?

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

Which is easier to maintain, Cosmos or Holly?

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