Sweet Pea 'Alisa'

Quick Facts

• Botanical Name: Lathyrus odoratus
• Classification: Semi-Grandiflora / Modern Grandiflora
• Petal Pattern: Solid / Self
• Color Profile: A radiant salmon-pink flush over a warm cream ground (often described as having a luminous "pink glow")
• Fragrance: Scented (Possesses the rich, reliable perfume typical of the Grandiflora classes)
• Breeder: Levko / Roger Parsons
• Year Introduced: 2001 (Levko) / 2015 (Parsons)
• Flowering Type: Summer-flowering (requires approximately 12 hours of daylight to initiate blooms)

Overview

'Alisa' is a highly acclaimed, beautifully scented sweet pea distinguished by its warm and inviting color palette. The blossoms feature a delicate salmon-pink tint that rests on a luminous cream foundation, giving the flowers a distinct, radiant glow. Classified as a Semi-Grandiflora (or Modern Grandiflora), it successfully combines the intense, nostalgic fragrance of 19th-century antiques with improved bloom size and stem length. Its outstanding performance and reliability have earned it the prestigious Award of Garden Merit (AGM) from the Royal Horticultural Society.

Growth Habit

Showcasing the vigorous climbing characteristics expected of a summer-flowering vine, 'Alisa' requires a sturdy and tall vertical support system. Securing the plants to a trellis, obelisk, or netting will encourage healthy upward stretch and provide the straight stems necessary for beautiful floral arrangements.

Cultivation Notes

To yield the strongest plants, initiate your seeds in deep modular trays (like Rootrainers) to establish a healthy, downward-reaching taproot system. Once the weather warms, transplant them into a well-nourished, deeply trenched bed. Nip out the central growing shoot when the young vines are a few inches tall to promote the growth of vigorous side branches. Ensure the soil remains consistently moist throughout the growing season, and harvest the blossoms incessantly. If the plant is allowed to develop seed pods, it will prematurely halt the production of new flowers.

Historical Notes

The horticultural archives reveal a collaborative, international timeline for this variety. It was originally bred by Levko and was first documented in botanical abstracts in 2001. It was later championed and introduced to a wider commercial audience by the esteemed British sweet pea specialist Roger Parsons in 2015. Its excellence as a garden plant is cemented by its receipt of the highly coveted AGM (Award of Garden Merit).

In the Garden

Grown for: Supplying an abundance of fragrant, glowing pastel flowers for the vase, and adding a warm, romantic presence to summer garden borders.

Companion Planting: Because of its cream base, it acts as a wonderful harmonizer. It pairs beautifully with solid warm creams (like 'Jilly' or 'Clotted Cream') to emphasize its soft foundation, or it can be contrasted strikingly with deep, cool tones like rich dark blues or purples.