Sweet pea 'Pandemonium' Lathyrus odoratus 'Pandemonium'

☠ Toxic to humans
🐾 Toxic to pets
🌸 Blooming
🍪 Not edible
‍🌱 Hard-care
sweet pea 'Pandemonium'


'Pandemonium' is a Spencer sweetpea, grown as a hardy annual. Its flowers are white, splashed or striped in light purple and pink.

Plant Info
Common Problems

About this plant

  • memoNames

    • Synonyms

      Sweet Pea, Perennial Pea, Everlasting Pea, Peavine, Sweetpea.

    • Common names

      Lathyrus odoratus 'Pandemonium'.

  • infoCharacteristics

    • Life cycle


    • Foliage type


    • Color of leaves


    • Flower color


    • Height

      6 feet (1.8 meters)

    • Spread

      1 foot (0.3 meters)

    • Plant type


    • Hardiness zones


    • Native area



  • money-bagGeneral Benefits

    • Aesthetic appeal: The Sweet Pea 'Pandemonium' offers vibrant and colorful flowers that can enhance the beauty of gardens and landscapes.
    • Fragrance: Sweet Peas are known for their sweet fragrance, which can create a pleasant sensory experience in the garden.
    • Attracts pollinators: The flowers attract bees, butterflies, and other pollinators, supporting local ecosystems.
    • Vertical interest: Sweet Peas are climbers, so they can add height to gardens by growing on trellises, fences, and other vertical structures.
    • Cutting garden value: The flowers are ideal for cutting and making fragrant bouquets and floral arrangements.
    • Easy to grow: They are generally easy to cultivate and are suitable for novice gardeners or those with limited gardening experience.
    • Seasonal coverage: As annuals, Sweet Peas can be used to fill gaps in perennial borders, providing color and interest during their blooming season.
    • Edible parts: While not specific to 'Pandemonium', some parts of certain Sweet Pea varieties are edible, like the young shoots and pea pods, but caution is needed as some varieties are toxic.

  • medicalMedical Properties

    This plant is not used for medical purposes.

  • windAir-purifying Qualities

    This plant is not specifically known for air purifying qualities.

  • leavesOther Uses

    • Lathyrus odoratus 'Pandemonium', commonly known as Sweet Pea, can be used as a natural dye; the flowers may be boiled to extract colors for fabrics or inks.
    • The dried stems of Sweet Pea can be weaved or braided into small items like baskets, providing a creative and aromatic crafting material.
    • The petals of Sweet Pea may be incorporated into potpourri blends for their delightful scent and diverse colors, enhancing the aroma of a room.
    • Sweet Pea petals can serve as decorative edible garnishes on salads and desserts, offering a mild flavor and attractive presentation.
    • The plant can be used in floral art, such as flower pressing, where the colorful blooms create beautiful natural art pieces when dried and pressed.
    • Sweet Pea vines are sometimes used in garden structures for teaching plant growth and climbing habits to students in educational settings.
    • As an organic confetti, dried Sweet Pea petals are both biodegradable and vibrant, making them suitable for eco-friendly celebrations.
    • During festive seasons, Sweet Pea flowers can be used to create natural and fragrant holiday ornaments, adding a floral touch to decorations.
    • Sweet Pea's foliage and tendrils can be crafted into small, green wreaths or incorporated into floral arrangements for a whimsical touch.
    • Finally, Sweet Pea seeds can be used in jewelry making, especially for creating unique, plant-themed necklaces and bracelets after proper treatment and preservation.

Interesting Facts

  • bedFeng Shui

    Sweet pea is not used in Feng Shui practice.

  • aquariusZodiac Sign Compitability

    Sweet pea is not used in astrology practice.

  • spiralPlant Symbolism

    • Blissful Pleasure: Known commonly as sweet pea, the Lathyrus odoratus 'Pandemonium' is often associated with pleasure. The name ‘sweet pea’ itself connotes a delightful presence and a gratifying experience.
    • Departure or Goodbye: In Victorian times, sweet peas were used to say goodbye. This might reflect the fleeting nature of their fragrance and blossoms, which can symbolize an endearing but transient encounter.
    • Thank You: Gifting sweet peas can be a way of expressing gratitude. Their attractive appearance and scent make them a heartfelt way to say "Thank you."
    • Delicate Pleasure: The sweet pea embodies the notion of delicate or soft pleasure; this mirrors the light and airy form of the flower and its subtle yet enchanting scent.
    • Adieu: Similar to departure, the sweet pea's historical use in farewells also makes it a symbol of adieu, a more intimate form of goodbye.

Every 1-2 weeks
2500 - 10000 Lux
Every 1-2 years
Spring to early summer
As needed
  • water dropWater

    Sweet peas, including Lathyrus odoratus 'Pandemonium', should be watered once the top inch of the soil feels dry. Typically, this means providing approximately 1 gallon of water per plant every week, but this can vary depending on climate conditions and the plant's stage of growth. During hot or windy conditions, they may require more frequent watering. It’s best to water early in the morning, using a watering can or hose to soak the soil at the base of the plant, avoiding the foliage to reduce the risk of mildew. Ensure proper drainage to prevent waterlogging, which can lead to root rot.

  • sunLight

    Sweet peas require full sun to bloom prolifically, meaning they should receive at least 6 hours of direct sunlight daily. Choose a spot in the garden where they are exposed to morning light and protected from the intense afternoon sun if you're in a particularly hot climate. However, in cooler regions, a position where they can bask in sunlight throughout the day is ideal.

  • thermometerTemperature

    Sweet peas thrive in cooler temperatures and are best grown in early spring when daytime temperatures are between 55°F and 65°F. They can tolerate a light frost and can be planted as soon as the soil can be worked, which may be when temperatures are still hovering around 40°F. However, they will start to falter when temperatures consistently rise above 75°F, and they usually do not survive in extreme heat.

  • scissorsPruning

    Pruning sweet peas encourages bushier growth and more blooms. Pinch off the tips of the plant when they are 4-6 inches tall to encourage side shoots. Deadhead regularly to prevent the plant from going to seed, which will prolong the flowering season. The best time for larger pruning tasks, such as cutting back spent plants, is after the flowering has ceased or as needed to maintain shape and health.

  • broomCleaning

    As needed

  • bambooSoil

    Sweet peas prefer rich, well-draining soil with a pH between 6.0 and 7.0. A good mix can be created using equal parts garden soil, compost, and well-rotted manure to provide nutrients and enhance the soil structure. Perlite or vermiculite can be added to ensure good drainage.

  • plantRepotting

    Sweet peas, being usually grown as annuals, do not typically require repotting. They are sown directly where they are to flower or started in pots before being transplanted outdoors once the risk of frost has passed.

  • water dropsHumidity & Misting

    Sweet peas thrive best in moderate humidity conditions. While they can tolerate a range from low to high humidity, it's important to ensure good air circulation to prevent fungal diseases, especially in areas with high humidity.

  • pinSuitable locations

    • Indoor

      Use sunny spot, fertile soil, and provide support for climbing.

    • Outdoor

      Plant in full sun, fertile soil, support required for vines.

    • Hardiness zone

      2-11 USDA

  • circleLife cycle

    Lathyrus odoratus 'Pandemonium', commonly known as sweet pea 'Pandemonium', begins its life as a seed planted in well-drained soil, typically in spring after the last frost. Upon germination, a small seedling emerges, developing a root system and a pair of true leaves, which will evolve into a climbing or trailing vine. As the plant matures, it produces more leaves and tendrils that help it to climb and support itself on structures or supports. The growth stage is marked by rapid vegetative expansion as the plant prepares to flower. The flowering stage occurs when the plant produces colorful, fragrant blossoms that are often used in bouquets and garden displays; this typically happens in late spring to early summer. After flowering, seed pods develop, which eventually dry and release seeds, completing the cycle and allowing for propagation if the seeds are collected and sown in the following season.

  • sproutPropogation

    • Propogation time

      Spring to early summer

    • The most popular method of propagating Sweet Pea 'Pandemonium' is by sowing seeds. The ideal time to start propagation by seeds is in late winter or early spring, to allow the plant to establish itself before the warm weather encourages flowering. Seeds should be soaked in water for 24 hours to soften the hard outer shell and encourage germination. After soaking, plant them about 1 inch deep in well-draining soil and space them about 2 to 3 inches apart. It's important to keep the soil moist but not waterlogged, and within 10-14 days, seeds typically begin to sprout. Once they're large enough to handle and after the threat of frost has passed, seedlings can be transplanted outdoors to a sunny location with rich, well-draining soil.