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Lagenaria siceraria

Bottle gourd

Common names: Calabash, Bottle calabash

Bottle gourd

Photo: 撮影者はカールおじさんです。 · CC BY-SA 3.0 · Source

This description was machine-translated.

Description

The bottle gourd (Lagenaria siceraria) is a vigorous climbing pumpkin that thrives in warmer climates and grows rapidly in summer. It produces large white flowers that open only at dusk and are pollinated by night-flying insects; during the day the flowers are usually closed. When harvested young, the fruits taste mild like zucchini and can be cooked in many ways. As they mature, the rind hardens and the fruit becomes the classic drinking or decorative calabash. Only young, mildly flavored fruits are edible; bitter fruits contain natural bitter compounds that can cause severe gastrointestinal upset and should not be eaten.

Care instructions

Start the plant indoors around mid‑April (week 16) on a windowsill, then transplant outdoors after the last frost, mid‑May (week 20), when night frosts are unlikely. It needs full sun, wind protection, fertile soil, and regular watering without waterlogging, especially on hot days. Provide a sturdy trellis at planting so the vines grow upward instead of rotting on the ground. Remove diseased or wilted leaves promptly and ensure good air circulation to prevent powdery mildew. Harvest ripe fruits before the first autumn cold in October, as even light frost can damage the plant.

Soil & site

Soil pH

4.0pH 6–78.0

Soil type

well-drained, humus-rich, nutrient-rich, moist

LightFull sun
HardinessFrost-sensitive
Crop rotationCucurbits
Water needHigh

Feeding

Heavy feeder

Companion planting

Good neighbors

legume family (Fabaceae)

Beans and peas enrich the soil with nitrogen, which cucurbits, as heavy feeders, can make good use of.

For example PeaBush beanPole beanBroad beanMarker peaSugar pea and 31 more species in the catalogue

Source: classic companion planting (DACH-Gartenpraxis)

Rather not

nightshade family (Solanaceae)

You should avoid planting potato and cucumber together because they share disease pathogens such as leaf and brown rot and stand in each other's way as strong feeders.

For example PotatoTomatoSweet pepperCocktail tomatoEggplantCape gooseberry and 9 more species in the catalogue

Source: basic crop-rotation rule

Companion planting is partly traditional gardening lore. Where the reason is known, it is given.

Some of these explanations were machine-translated.

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