Essentials
At a Glance
Plant Type
Annual
Height
48 inches
Width
30 inches
Light
Full Sun, Partial Sun
Zones
5, 6, 7, 8
Water
Moderate
Humidity
Average
Lifespan
Perennial in mild climates, annual elsewhere
Native To
Mediterranean
Toxicity
Toxic to pets if ingested
The Story
Plant Bio
Sweet Peas are known for their delightful fragrance and climbing habit. Lathyrus odoratus is popular for its historic significance and variety of colors.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Tuck seeds into moist soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity during propagation.
- Transplant seedlings when they have at least two sets of true leaves, typically after 6 weeks.
- Support vines with trellises or stakes as they grow taller.
- Water consistently, especially during dry spells, to promote healthy blooming.
- Fertilize monthly with a balanced, water-soluble fertilizer for vibrant flowers.
Pro Tip
Soak seeds overnight before planting to improve germination success.
Keep It Thriving
Care Guide
Do
- Water regularly to keep soil moist but not waterlogged 🌱
- Provide support for climbing vines to prevent damage
- Prune after flowering to encourage new growth
- Use a balanced fertilizer monthly for best blooms
Don't
- Avoid overwatering, which can cause root rot ❌
- Do not let plants dry out completely during peak growth
- Avoid fertilizing late in the season to prevent weak growth
- Refrain from using chemical pesticides without organic options
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Harvest | ||||||||||||
| Pinch | ||||||||||||
| Plant | ||||||||||||
| Stake |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Sweet Pea questions
What zones can Sweet Pea grow in?
Sweet Pea is hardy in USDA Zones 5–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Sweet Pea deer resistant?
Yes — Sweet Pea is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Sweet Pea bloom?
Sweet Pea typically blooms in mid-spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Sweet Pea need full sun?
Sweet Pea does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
More Lathyrus to compare
Cupani Sweet Pea
Lathyrus odoratus 'Cupani'
Pulsar Sweet Pea
Lathyrus odoratus 'Pulsar'
Erewhon Sweet Pea
Lathyrus x belinensis 'Erewhon'
Sweet Pea
Lathyrus odoratus 'Painted Lady'
Sweet Pea 'High Society'
Lathyrus odoratus 'High Society'
Nimbus Sweet Pea
Lathyrus odoratus 'Nimbus'
Keep exploring
Explore the genus
Collections featuring this plant
Hardy in your zone?
Grow Sweet Pea with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.
