Origin
Trichostema austromontanum F.H. Lewis ssp. austromontanum is a plant species that belongs to the Lamiaceae or mint family. This plant species is native to California, specifically in the western United States, most notably the coastal mountain ranges from Monterey County to San Diego County.
Common Names
This plant species has several common names, including Southern Bluecurls, Southern Tarweed, and Mountain Bluecurls. It is also locally known as the hummingbird plant because of its ability to attract hummingbirds.
Uses
Historically, the indigenous peoples in California used Trichostema austromontanum F.H. Lewis ssp. austromontanum for medicinal purposes, such as treating coughs and colds. Fast forwarding to the present, this plant species is now mainly used for ornamental purposes in gardens, parks, and landscapes. This is due to its beautiful blue-colored flowers and its ability to attract pollinators, such as bees and hummingbirds.
General Appearance
Trichostema austromontanum F.H. Lewis ssp. austromontanum is a perennial plant that can grow up to 3 feet tall. It has several stems that are densely covered with long, fine hairs and narrow leaves that are aromatic when crushed. The flowers of this plant species are tubular, about 1 inch long, and have bright blue or purple-blue colors. These flowers are arranged in spikes at the top of the stems and can bloom from June to October.
Growth Conditions for Trichostema austromontanum F.H. Lewis ssp. austromontanum
Light Requirements: Trichostema austromontanum F.H. Lewis ssp. austromontanum thrives in full sun to partial shade environments. As a plant native to California, it is adapted to bright, direct sunlight, and requires at least six hours of sunlight per day for healthy growth. However, it can also tolerate some shade and is often found growing around the edges of woodlands or in areas with dappled sun.
Temperature Requirements: Trichostema austromontanum F.H. Lewis ssp. austromontanum is adapted to a wide range of temperatures but prefers a Mediterranean climate with mild, wet winters and hot, dry summers. In general, it can tolerate a wide range of temperatures, from cool coastal temperatures to hot, inland desert conditions. However, it may require some protection from extreme heat or frost depending on the location and climate.
Soil Requirements: Trichostema austromontanum F.H. Lewis ssp. austromontanum prefers well-draining soils that are medium to fine-textured and have a slightly acidic to neutral pH level. It can tolerate soils with some sand or gravel but does not thrive in heavy, compacted soils. The plant is known to grow in soils derived from various geological formations, including shale, sandstone, and serpentine, but it requires soils with good drainage to avoid root rot and other fungal diseases.
Cultivation Methods
Trichostema austromontanum F.H. Lewis ssp. austromontanum, also known as the Southern Californian Bluecurls, can be cultivated both outdoors and indoors. If you plan on growing these plants indoors, be sure to place them in an area where they are exposed to full sunlight. In contrast, if you plan on growing them outdoors, they should be placed in a location with partial shade to ensure their survival during hot summer months. The soil should be well-drained and moist to prevent the roots from rotting.Watering Needs
The watering needs of the Trichostema austromontanum F.H. Lewis ssp. austromontanum vary depending on the environment in which they are planted. If you're growing these plants indoors, watering should be done once a week. In contrast, if you're growing them outdoors, twice-weekly watering is recommended during the warmest months of the year. Always wait until the top layer of soil is dry before watering your plants to avoid overwatering.Fertilization
Trichostema austromontanum F.H. Lewis ssp. austromontanum typically doesn't require much fertilization. You can opt to add a slow-release fertilizer once a year during the growing season. It's best to choose a fertilizer with a balanced N-P-K ratio for the best results.Pruning
Pruning Trichostema austromontanum F.H. Lewis ssp. austromontanum is typically necessary only to control the plant's growth or appearance. These plants do not require regular pruning. However, if you notice any dead or damaged leaves, they should be trimmed away. Additionally, if you'd like to shape the plant, prune the tips of the branches in early spring or late winter.Propagation of Trichostema austromontanum F.H. Lewis ssp. austromontanum
Trichostema austromontanum F.H. Lewis ssp. austromontanum, commonly known as southern blue curls, is a California native plant that thrives in full sun and well-draining soils. Propagating this plant can be achieved through two primary methods, seeds, and cuttings.
Propagation by Seeds
The ideal time to collect the seeds from Trichostema austromontanum F.H. Lewis ssp. austromontanum is during the fall. Once the seeds have been collected, they must be cleaned to remove any debris. Scarification, a process of breaking the seed coat, can enhance the chances of germination. Soaking the seeds overnight can also help with the germination process.
Trichostema austromontanum F.H. Lewis ssp. austromontanum seeds must be planted in well-draining soil mixtures. Sow the seeds at a depth of one-fourth inch and maintain moisture throughout the germination period. The ideal temperature for germination is around 70 degrees Fahrenheit. Germination usually takes around two to three weeks.
Propagation by Cuttings
Cuttings are another reliable way to propagate Trichostema austromontanum F.H. Lewis ssp. austromontanum. The best time to take cuttings is during late summer or early fall. Cut a stem of around four inches long with a pair of clean, sharp scissors or pruning shears.
Remove the leaves from the bottom half of the cutting and treat the end with rooting hormone powder. Plant the prepared cutting in soil with good drainage. Keep the soil moist and the cutting in a shaded location. Rooting usually takes about six to eight weeks.
Both seed propagation and cutting propagation can be successful if done correctly. Once the propagation process is over, transplant the young plants into their permanent location in the garden. With proper care, Trichostema austromontanum F.H. Lewis ssp. austromontanum can provide vibrant blue flowers throughout the summer season.
Disease and Pest Management for Trichostema Austromontanum F.H. Lewis ssp. Austromontanum
Trichostema austromontanum F.H. Lewis ssp. austromontanum is a native plant in California that is resistant to many diseases and pests. However, it can still be affected by certain issues that can cause damage or death to the plant. Here are some common diseases and pests that might affect Trichostema austromontanum and ways to manage them.
Common Diseases
One of the most common diseases that affect Trichostema austromontanum is powdery mildew. Powdery mildew appears as a white or gray powdery substance on the leaves of the plant. It can spread rapidly and cause damage to the plant's foliage.
To manage powdery mildew, it is advisable to remove the affected parts and dispose of them properly. Avoid wetting the leaves and foliage as it can promote the growth of the fungus. Applying fungicide treatments can also help control the spread of the disease.
Common Pests
Trichostema austromontanum is susceptible to various pests, including spider mites, aphids, and whiteflies. These pests suck the sap from the leaves and tender stems of the plant and can cause damage, wilting and disease in the plant.
To manage pest infestations, it is recommended to hose down the plant with water to remove insects. You can also introduce natural predators, like ladybugs or lacewings, to control the pests. Insecticidal soaps or oils can be used as a last resort.
Additional Care
Proper care is critical to preventing disease and pest problems in Trichostema austromontanum. You must water the plant regularly and avoid overhead watering. The plant should be planted in well-drained soil to prevent the growth of fungus. Over-fertilization can make the plant more susceptible to diseases and pests, so only use fertilizers sparingly and during the growing season.
Taking care of Trichostema austromontanum properly can prevent and manage pest and disease problems. In case of persistent infections, it may be necessary to consult a professional landscaper.
