Streptanthus flavescens, synonyms including Guillenia flavescens, is a species of mustard plant in the family Brassicaceae. It is one of several species known by the common name yellow mustard, though the plant most widely known as yellow mustard is probably Sinapis alba. S. flavescens is a thin-stemmed annual herb growing large, lobed or toothed leaves up to 22 centimeters long around its base, and smaller, less toothed leaves along its gray-pink to brown stem. At intervals along the upper stem appear cream, yellowish, or very pale purple flowers, each somewhat cuboid in shape and about a centimeter long. The tips of the petals around the mouth are curled, flared, or claw-like. The fruit is a thin silique up to 9 centimeters long. This species is endemic to California, where it grows in the valleys and mountains surrounding the San Francisco Bay Area.
Yellow mustard is fairly disease-resistant and typically not prone to illnesses. However, it can be vulnerable to pests and diseases in its environment, and these infections are usually mild. Regarding care, this plant requires moderate maintenance. It should be pruned regularly to preserve a good appearance and healthy growth. Fertilizing can also help encourage flowering. Yellow mustard is suitable for anyone with outdoor space, such as a garden or patio, and does not demand extensive care experience. It may need more attention when grown indoors.
How to keep Streptanthus Flavescens.
Light
Yellow mustard is native to clear, open spaces where it flourishes under full sunlight. It can withstand semi-shaded conditions, but it grows best in direct sun. Noted for its affinity for sunlight, this plant, which grows on a yearly or bi-yearly cycle, flourishes under these conditions.
Fertilizer
To encourage vigorous leaf growth in Yellow mustard, it's beneficial to apply diluted fertilizers regularly. It's suggested to provide the Yellow mustard plant with fertilizer around once per month throughout the summer season. Nitrogen plays a significant role in foliage health, and using nitrogen-heavy additives can help Yellow mustard to flourish.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Annual
- Genus
- Streptanthus
- Family
- Brassicaceae
- Hardiness Zone
- 7-10
- Mature Height
- 30 cm to 61 cm
- Mature Spread
- 20 cm to 30 cm
- Leaf Color
- Green
- Leaf Type
- Deciduous
- Flower Size
- 1.02 cm to 1.52 cm
- Bloom Time
- Early spring, Mid spring
- Planting Time
- Spring, Summer, Autumn
- Harvest Time
- Late spring, Early summer
Other names.
