Penstemon vs Southern Magnolia

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

Penstemon

Penstemon digitalis

Plantaginaceae · flowers

Deer ResistantDrought TolerantLow Maintenance

Southern Magnolia

Magnolia grandiflora

Magnoliaceae · trees

Deer ResistantLow Maintenance

Hardiness Zone Range

Penstemon (Zones 3-8)

Southern Magnolia (Zones 7-10)

Overlap: Both grow in zones 7–8

Detailed Comparison

Feature	Penstemon	Southern Magnolia
Scientific Name	Penstemon digitalis	Magnolia grandiflora
Family	Plantaginaceae	Magnoliaceae
Category	flowers	trees
Sun	☀️ Full Sun	☀️ Full Sun to Part Shade
Water	💧 Low	💧💧 Medium
Soil	Well-drained	Rich, Well-drained, Acidic
Height	3'	80'
Spread	1' 6"	40'
Bloom Season	Early Summer	Late Spring-Summer
Bloom Color	White, Pink, Purple	White
Growth Rate	Medium	Medium
Native Region	North America	Southeastern US
Maintenance	Low	Low

Special Traits

Penstemon

No — EdibleYes — Deer ResistantYes — Drought Tolerant

Southern Magnolia

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Penstemon

✓Excellent drainage essential — root rot is the main killer.
✓Don't over-fertilize or overwater.
✓Cut back after first flush for possible rebloom.
✓Short-lived but self-seeds.

Southern Magnolia

✓Protect from winter winds in northern range.
✓Give space for lower branches to sweep the ground.
✓Leaves are slow to decompose.
✓Large seed pods with red seeds.

Which Plant Is Right for Your Garden?

Choose Penstemon if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 3–8.

Choose Southern Magnolia if you want a low-maintenance plant, and want deer resistance. It thrives in full sun to part shade with medium water in zones 7–10.

Plant them together? Both overlap in zones 7–8. However, they have different sun needs, so plan your garden layout carefully.

View PenstemonProfile →View Southern MagnoliaProfile →

Frequently Asked Questions

Can Penstemon and Southern Magnolia grow in the same hardiness zone?

Penstemon grows in USDA zones 3-8, while Southern Magnolia grows in zones 7-10. Both plants can grow together in zones 7 through 8.

Do Penstemon and Southern Magnolia have the same sun and water needs?

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

Which grows taller, Penstemon or Southern Magnolia?

Southern Magnolia grows taller at 80' compared to Penstemon at 3'. Southern Magnolia spreads 40' while Penstemon spreads 1' 6".

Are Penstemon and Southern Magnolia deer resistant?

Yes, both Penstemon and Southern Magnolia are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Penstemon or Southern Magnolia?

Both Penstemon and Southern Magnolia 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	Penstemon	Southern Magnolia
Scientific Name	Penstemon digitalis	Magnolia grandiflora
Family	Plantaginaceae	Magnoliaceae
Category	flowers	trees
Sun	☀️ Full Sun	☀️ Full Sun to Part Shade
Water	💧 Low	💧💧 Medium
Soil	Well-drained	Rich, Well-drained, Acidic
Height	3'	80'
Spread	1' 6"	40'
Bloom Season	Early Summer	Late Spring-Summer
Bloom Color	White, Pink, Purple	White
Growth Rate	Medium	Medium
Native Region	North America	Southeastern US
Maintenance	Low	Low

Care Tips

Penstemon

✓Excellent drainage essential — root rot is the main killer.
✓Don't over-fertilize or overwater.
✓Cut back after first flush for possible rebloom.
✓Short-lived but self-seeds.

Southern Magnolia

✓Protect from winter winds in northern range.
✓Give space for lower branches to sweep the ground.
✓Leaves are slow to decompose.
✓Large seed pods with red seeds.

Which Plant Is Right for Your Garden?

Choose Penstemon if you want a low-maintenance plant, need drought tolerance, and want deer resistance. It thrives in full sun with low water in zones 3–8.

Choose Southern Magnolia if you want a low-maintenance plant, and want deer resistance. It thrives in full sun to part shade with medium water in zones 7–10.

Plant them together? Both overlap in zones 7–8. However, they have different sun needs, so plan your garden layout carefully.

Frequently Asked Questions

Can Penstemon and Southern Magnolia grow in the same hardiness zone?

Penstemon grows in USDA zones 3-8, while Southern Magnolia grows in zones 7-10. Both plants can grow together in zones 7 through 8.

Do Penstemon and Southern Magnolia have the same sun and water needs?

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

Which grows taller, Penstemon or Southern Magnolia?

Southern Magnolia grows taller at 80' compared to Penstemon at 3'. Southern Magnolia spreads 40' while Penstemon spreads 1' 6".

Are Penstemon and Southern Magnolia deer resistant?

Yes, both Penstemon and Southern Magnolia are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Penstemon or Southern Magnolia?

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