Japanese Painted Fern vs Sweet Pea

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

Japanese Painted Fern

Athyrium niponicum

Athyriaceae · ferns

Deer ResistantLow Maintenance

Sweet Pea

Lathyrus odoratus

Fabaceae · flowers

Deer ResistantMedium Maintenance

Hardiness Zone Range

Japanese Painted Fern (Zones 4-8)

Sweet Pea (Zones 2-11)

Overlap: Both grow in zones 4–8

Detailed Comparison

Feature	Japanese Painted Fern	Sweet Pea
Scientific Name	Athyrium niponicum	Lathyrus odoratus
Family	Athyriaceae	Fabaceae
Category	ferns	flowers
Sun	⛅ Part Shade to Full Shade	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Moist	Rich, Well-drained
Height	1' 6"	6'
Spread	2'	1'
Bloom Season	Non-flowering	Spring-Summer
Bloom Color	None	Mixed
Growth Rate	Medium	Fast
Native Region	Japan, East Asia	Italy, Sicily
Maintenance	Low	Medium

Special Traits

Japanese Painted Fern

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Sweet Pea

No — EdibleYes — Deer ResistantNo — Drought Tolerant

Care Tips

Japanese Painted Fern

✓Provide consistent moisture but not soggy soil.
✓Pairs beautifully with hostas and astilbes.
✓Cut back dead fronds in spring.
✓Slowly spreads to form elegant colonies.

Sweet Pea

✓Soak seeds overnight before planting.
✓Provide trellis or netting.
✓Pick flowers frequently to prolong bloom.
✓Needs cool weather — plant early spring or fall in warm areas.

Which Plant Is Right for Your Garden?

Choose Japanese Painted Fern if you want a low-maintenance plant, and want deer resistance. It thrives in part shade to full shade with medium water in zones 4–8.

Choose Sweet Pea if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 2–11.

Plant them together? Both overlap in zones 4–8. However, they have different sun needs, so plan your garden layout carefully.

View Japanese Painted FernProfile →View Sweet PeaProfile →

Frequently Asked Questions

Can Japanese Painted Fern and Sweet Pea grow in the same hardiness zone?

Japanese Painted Fern grows in USDA zones 4-8, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 4 through 8.

Do Japanese Painted Fern and Sweet Pea have the same sun and water needs?

Japanese Painted Fern needs part shade to full shade and medium water, while Sweet Pea needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Japanese Painted Fern or Sweet Pea?

Sweet Pea grows taller at 6' compared to Japanese Painted Fern at 1' 6". Sweet Pea spreads 1' while Japanese Painted Fern spreads 2'.

Are Japanese Painted Fern and Sweet Pea deer resistant?

Yes, both Japanese Painted Fern and Sweet Pea are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Japanese Painted Fern or Sweet Pea?

Japanese Painted Fern has low maintenance while Sweet Pea has medium maintenance. Japanese Painted Fern may be easier for beginning gardeners to manage.

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Detailed Comparison

Feature	Japanese Painted Fern	Sweet Pea
Scientific Name	Athyrium niponicum	Lathyrus odoratus
Family	Athyriaceae	Fabaceae
Category	ferns	flowers
Sun	⛅ Part Shade to Full Shade	☀️ Full Sun
Water	💧💧 Medium	💧💧 Medium
Soil	Rich, Moist	Rich, Well-drained
Height	1' 6"	6'
Spread	2'	1'
Bloom Season	Non-flowering	Spring-Summer
Bloom Color	None	Mixed
Growth Rate	Medium	Fast
Native Region	Japan, East Asia	Italy, Sicily
Maintenance	Low	Medium

Care Tips

Japanese Painted Fern

✓Provide consistent moisture but not soggy soil.
✓Pairs beautifully with hostas and astilbes.
✓Cut back dead fronds in spring.
✓Slowly spreads to form elegant colonies.

Sweet Pea

✓Soak seeds overnight before planting.
✓Provide trellis or netting.
✓Pick flowers frequently to prolong bloom.
✓Needs cool weather — plant early spring or fall in warm areas.

Which Plant Is Right for Your Garden?

Choose Japanese Painted Fern if you want a low-maintenance plant, and want deer resistance. It thrives in part shade to full shade with medium water in zones 4–8.

Choose Sweet Pea if you don't mind medium maintenance, and want deer resistance. It thrives in full sun with medium water in zones 2–11.

Plant them together? Both overlap in zones 4–8. However, they have different sun needs, so plan your garden layout carefully.

Frequently Asked Questions

Can Japanese Painted Fern and Sweet Pea grow in the same hardiness zone?

Japanese Painted Fern grows in USDA zones 4-8, while Sweet Pea grows in zones 2-11. Both plants can grow together in zones 4 through 8.

Do Japanese Painted Fern and Sweet Pea have the same sun and water needs?

Japanese Painted Fern needs part shade to full shade and medium water, while Sweet Pea needs full sun and medium water. Their differing requirements mean you may need separate garden areas for each.

Which grows taller, Japanese Painted Fern or Sweet Pea?

Sweet Pea grows taller at 6' compared to Japanese Painted Fern at 1' 6". Sweet Pea spreads 1' while Japanese Painted Fern spreads 2'.

Are Japanese Painted Fern and Sweet Pea deer resistant?

Yes, both Japanese Painted Fern and Sweet Pea are considered deer resistant, making them excellent choices for gardens in areas with deer pressure.

Which is easier to maintain, Japanese Painted Fern or Sweet Pea?

Japanese Painted Fern has low maintenance while Sweet Pea has medium maintenance. Japanese Painted Fern may be easier for beginning gardeners to manage.