How to care for the gooseneck loosestrife (Lysimachia clethroides)

Lysimachia clethroides gooseneck loosestrife

Gooseneck loosestrife (Lysimachia clethroides) is a perennial. It spreads by runners and can form dense stands in suitable locations. Its white flowers appear from July to September in central Europe. This native to Eastern Asia and Eastern Russia member of the primrose family (Primulaceae) can reach a height of 90 centimeters.

Mexican grass carrying wasp on gooseneck loosestrife
Mexican grass carrying wasp (Isodontia mexicana) on gooseneck loosestrife.

Gooseneck loosestrife in the garden

Lysimachia clethroides does not like drought. It does best in sunny to partial shade with evenly moist soil that may contain some humus or loam. It requires little care in such locations. Frost tolerance is said to be as low as -13 °F (-25 °C).

Lysimachia clethroides

Gooseneck loosestrife needs regular watering until it becomes established in the garden, which can take about six months.

It can be fertilized occasionally with compost or watered with pond water. The best fertilizer, however, is healthy ground. Where leaves and other plant parts are allowed to decompose.

Gooseneck loosestrife

Insects on the gooseneck loosestrife

Although not native to Germany, gooseneck loosestrife is very popular with our insects.

seven spotted ladybug on gooseneck loosestrife
A seven-spot ladybug searches for aphids inside the leaves of the gooseneck loosestrife.
Anthracite Bee-fly on gooseneck loosestrife
Anthracite Bee-fly (Anthrax anthrax)
Hornet mimic hoverfly on gooseneck loosestrife
Hornet mimic hoverfly (Volucella zonaria)
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