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PHASEOLUS vulgaris 'Tendergreen Improved'

Image of Phaseolus vulgaris 'Tendergreen Improved'



Botanical Name

PHASEOLUS vulgaris 'Tendergreen Improved'

Plant Common Name

Bush Bean

General Description

This is an improved form of the early American stringless heirloom ‘Tendergreen’, which was first introduced in 1925. This disease resistant bush bean produces loads of long, straight, green beans that are almost entirely stringless. The beans are ready for harvest around 50 days after sowing. Like most modern bean cultivars this selection is self-fertile.

Bean leaves are trifoliate (three-leaved), arranged in an alternate fashion on the stem and have somewhat diamond-shaped leaflets. The flowers are typical of peas or beans; larger, rounded petals subtend smaller petals that form a lip or keeled beak. They are produced in loose clusters on short stalks among the foliage and may be white or pinkish. Modern bean cultivars are self-fertile. If harvested young the immature bean pods are eaten, as with green or wax beans. If allowed to mature, the dry, hard seeds can be shucked, stored and eaten at a later date, as with black beans or pintos.

After the danger of frost has passed, plant bush beans in full sun and fertile, evenly moist, well-drained garden loam. Seeds should be sown directly in the soil at a depth of about three times their width. Bush types should be spaced about a finger’s length apart, in rows wide enough to allow easy access to the plants. Overwatering seeds prior to germination may cause them to rot, so be sure to keep them moderately moist, never wet. To ensure a longer harvest, successive plantings may be made two to three weeks apart, continuing through midsummer. Tossing the seeds in a commercially available Rhizobium inoculant may be beneficial, but is not essential for success. Harvest beans every few days to keep plants producing and to pick the pods at their most tender.

Originating from regions of Central and South America, common beans have been cultivated for many centuries. These frost-tender vegetables are grown as summer crops in cooler temperate climates; whereas in warm, tropical zones they are planted as fall and winter crops.


  • Sunset Zone

    A1, A2, A3, H1, H2, 1a, 1b, 2a, 2b, 3a, 3b, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

  • Plant Type


  • Sun Exposure

    Full Sun

  • Height

    1'-10' / 0.3m - 3.0m

  • Width

    1'-3' / 0.3m - 0.9m

  • Bloom Time


  • Native To

    Central America, South America

Growing Conditions

  • Soil pH

    Neutral, Alkaline

  • Soil Drainage

    Well Drained

  • Soil type

    Loam, Sand

  • Growth Rate


  • Water Requirements

    Average Water

  • Habit


  • Seasonal Interest

    Spring, Summer, Fall

Ornamental Features

  • Flower Interest


  • Flower Color

    White, Lavender

  • Fruit Color


  • Foliage Color (Spring)

    Green, Dark Green

  • Foliage Color (Summer)

    Green, Dark Green

  • Foliage Color (Fall)

    Green, Dark Green

  • Foliage Color (Winter)


  • Fragrant Flowers


  • Fragrant Fruit


  • Fragrant Foliage


  • Bark or Stem Fragrant


  • Flower Petal Number


  • Repeat Bloomer


  • Showy Fruit


  • Edible Fruit


  • Showy Foliage


  • Foliage Texture


  • Foliage Sheen


  • Evergreen


  • Showy Bark


Special Characteristics

  • Usage

    Edible, Herb / Vegetable

  • Sharp or Has Thorns


  • Invasive


  • Self-Sowing