Sisymbrium altissimum

How to Grow Sisymbrium altissimum

Overview

Sisymbrium altissimum, also known as tall mustard or tumbleweed mustard, is a fascinating plant native to the western Mediterranean Basin. Its ability to thrive in various environments has made it widely naturalized across the globe, including North America. After reaching maturity, this plant forms a unique tumbleweed, adding an interesting dimension to your garden.

Growing Conditions

Sisymbrium altissimum is well-suited for growers seeking low-maintenance plants that can still make a statement in their garden. It prefers full sun exposure and can tolerate a wide range of soil types, making it ideal for beginners or those with limited garden space. This hardy plant can withstand drought conditions once established, making it perfect for xeriscaping.

Planting & Care

Plant Sisymbrium altissimum seeds directly into the ground after the last frost in spring. The seeds germinate quickly under warm soil conditions. Water regularly during dry spells, but be mindful not to overwater as this plant does not require much care. Pruning isn't necessary unless you want to control its growth or encourage bushier plants.

Common Problems

Tall mustard is generally a robust and disease-resistant plant. However, like all garden plants, it can occasionally suffer from pests such as aphids or caterpillars. If you notice infestations, simply remove the affected leaves or use organic pest control methods like insecticidal soap or neem oil.

Harvest or Enjoy

Once your Sisymbrium altissimum reaches maturity, typically within a few months of planting, it will produce small yellow flowers that attract pollinators. After flowering, the plant forms a tumbleweed, which you can collect and enjoy for its unique appearance and historical significance. The seeds can also be harvested and saved for future plantings or sharing with fellow gardeners.

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