Trichostema lanatum — an easy houseplant, prefers full sun light
SPECIMEN · FROM THE LIBRARY
Trichostema lanatum

Trichostema Lanatum

Updated · 121 observations
ON THIS PLANT

Trichostema lanatum, commonly known as woolly bluecurls, is a perennial herbaceous plant that belongs to the mint family (Lamiaceae). Native to California, this plant thrives in various habitats, including chaparral, coastal sage scrub, and oak woodlands.

Woolly bluecurls grow up to 2-3 feet tall and feature a woody base with numerous branches. The narrow, lance-shaped leaves are grayish-green, giving them a distinct woolly appearance. The small flowers, approximately 1/4 inch in size, boast bright blue-violet petals arranged in dense clusters at the ends of the stems.

Blooming from late spring through summer, woolly bluecurls attract bees, butterflies, and other pollinators. The plant thrives in well-drained soils and can grow in full sun or partial shade, tolerating drought conditions once established.

In traditional practices, Native Americans in California used Trichostema lanatum for various medicinal purposes, such as treating respiratory ailments like coughs and colds, by making tea from its leaves or flowers.

Overall, Trichostema lanatum is an attractive native plant that provides significant ecological benefits for pollinators. Additionally, it holds cultural importance for Indigenous communities who have utilized it medicinally for generations.

A note from PlantMom

Wooly Bluecurls is well resistant to disease and generally isn’t prone to illnesses. Regarding care, this plant is fairly low-maintenance. When grown outdoors it needs little watering, and larger specimens usually don’t require pruning. Smaller plants, however, should be pruned after they finish blooming. Wooly Bluecurlst is suitable for anyone with an outdoor area, such as a garden or deck, and does not require much gardening experience.

— PlantMom
CARE GUIDE

How to keep Trichostema Lanatum.

Light

Wooly Bluecurls does best with direct, unobstructed sunlight. It comes from habitats where sunlight is abundant throughout the day. At every stage of development, this plant needs strong solar light. Too little light can limit growth, while too much light generally does not cause problems.

Water

Woolly Bluecurls is well-adapted to dry chaparral habitats and exhibits impressive drought tolerance. It thrives with watering every two weeks. This plant prefers full sun and can be successfully grown outdoors or in containers, where moisture levels are easily managed.

Temperature

Wooly Bluecurls adapts well to a variety of climate conditions, from very hot summers to cold winters. However, it does have an ideal temperature range for growth. When temperatures become excessively high, the plant can suffer stress from heat and humidity, which may kill it. In areas where temperatures near the lower limit of its cold tolerance, it is necessary to provide insulation to protect the plant.

Fertilizer

Proper timing is important for fertilizing Wooly Bluecurls. Fertilize in early spring and continue monthly until early summer. Fertilizer promotes attractive blooms and supplies energy during both dormant and active growth phases.

Pruning

Wooly Bluecurls is a drought-tolerant shrub known for its aromatic leaves and beautiful blue-purple flowers. To encourage growth and maintain its shape, prune the plant in late spring after it has finished flowering. Focus on removing dead wood and thinning out dense areas. For the best results, use clean, sharp tools to make precise cuts, which will help promote healthier blooms.

Pot & Repot

Repot woolly bluecurls every 2 to 3 years during the spring. Choose a slightly larger pot with good drainage. After repotting, water sparingly to prevent root rot. Place the woolly bluecurls in a sunny location to encourage healthy foliage growth.

CHARACTERISTICS

Botanical profile.

Plant Type
Shrub
Life Cycle
Perennial
Genus
Trichostema
Family
Lamiaceae
Hardiness Zone
8-10
Mature Height
0.91 m to 1.22 m
Mature Spread
0.91 m to 1.22 m
Leaf Color
Green
Leaf Type
Evergreen
Flower Color
Lavender, Purple
Flower Size
30.48 cm
Bloom Time
Mid spring, Late spring, Early summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Mid summer, Late summer, Early fall
Native Area
Mexico
ALSO KNOWN AS

Other names.

en Woolly bluecurls en Woolly Blue Curls en Romero
FREQUENTLY ASKED

Reader questions.

How should I water my Wooly Bluecurls plant?

Your Wooly Bluecurls plant is not picky about how you water it. You can use common watering tools like watering cans, hoses, or even cups. The most important thing is to water the soil directly. Ensure that all areas of the soil are equally moist, so that the entire root system gets the water it needs. It's best to use filtered water to avoid harmful particles from tap water. Also, use water that is at or slightly above room temperature, as extremely hot or cold water can be a shock to the plant. However, overall, the Wooly Bluecurls plant usually responds well to any kind of water you give it.

Why is it necessary to fertilize my Wooly Bluecurls?

Fertilizing your Wooly Bluecurls is essential for several reasons. One important reason is that it encourages the production of beautiful blooms. It is especially beneficial to fertilize in early spring to ensure that your Wooly Bluecurls has excellent flowers during that season. Fertilizer also provides your Wooly Bluecurls with ample energy that it can store in the ground during dormant growth phases. By giving your Wooly Bluecurls extra nutrients during fall planting or late spring, you can help it retain more energy to use when active growth resumes.

What are the sunlight requirements for Wooly Bluecurls?

Wooly Bluecurls requires over 6 hours of sunlight daily to thrive. It's crucial to observe the movement of sunlight in your garden to find spots that offer a balance of light and shade, ensuring optimal growth conditions for your plants. Wooly Bluecurls originates from environments with abundant sunlight, making strong solar illumination essential throughout its growth stages. Although it generally does well with significant sun exposure, inadequate light can impede its growth.

What should I do if I give too much or too little water to my Wooly Bluecurls?

When it comes to outdoor plants, especially new plants or seedlings, they can easily experience a lack of watering. It's important to consistently water them for a few months until they establish strong roots. Once the roots are established, they can rely on rain for most of their water needs. However, if you have potted Wooly Bluecurls, overwatering can be a common issue. If you accidentally overwater your plant, stop watering it immediately to minimize the damage. Take the plant out of its pot and check the roots for signs of root rot. If there is no root rot, you can put the plant back in its pot. But if you do find root rot, trim the affected roots and consider using a fungicide. Make sure to replant the Wooly Bluecurls in well-draining soil. On the other hand, if your Wooly Bluecurls is underwatered, simply water it more frequently. If you notice the leaves drooping, drying out, or falling off, increase your watering frequency. It's important to correct your watering routine promptly when you notice underwatering.

What is the ideal time to fertilize my Wooly Bluecurls?

To effectively fertilize Wooly Bluecurls, timing is crucial. Applying fertilizer too early while the plant is still dormant is ineffective and wasteful, as it will be washed away by rainwater, causing pollution. The first application of fertilizer should be in early spring, followed by monthly applications until early summer.

How important is sunlight for the growth of Wooly Bluecurls?

Sunlight plays a paramount role in the growth of Wooly Bluecurls, as it thrives best under unobstructed exposure to the sun. This plant is accustomed to plentiful sunlight in its native habitat, which is necessary for its development at all growth stages. Insufficient sunlight can lead to growth inhibition, but fortunately, Wooly Bluecurls is not typically adversely affected by excessive sunlight.

How frequently do I need to water my Wooly Bluecurls?

Most outdoor plants can grow naturally with rainfall, but if your area lacks rainfall, you should water them every 2 weeks during spring and fall, and more frequently in summer. In winter, when growth slows down, water less often, and in some cases, no additional watering is necessary. If your Wooly Bluecurls plant is young or newly planted, it needs more frequent watering to help it establish and grow to be more adaptable and drought-tolerant. For potted plants, you have two options for determining watering frequency. One option is to follow a predetermined schedule, such as watering once a week or once every other week. However, this approach may not work well if you don't consider the specific conditions of your Wooly Bluecurls' growing environment. Another option is to base watering frequency on the moisture level of the soil. It's generally best to wait until the top couple of inches of soil have completely dried out before watering again. This usually corresponds to about one-third to one-half of the depth of the pots.

When should I not put fertilizer on my Wooly Bluecurls?

To ensure the proper growth and development of Wooly Bluecurls, avoid using fertilizer with excessive nitrogen. Too much nitrogen can result in abundant leaves but fewer blooms. Instead, opt for a fertilizer with a lower nitrogen content compared to other nutrients. Additionally, refrain from fertilizing Wooly Bluecurls after early autumn, as this can stimulate excessive growth just before winter. Moreover, it is not recommended to fertilize during periods of hot and dry conditions as dry soil does not effectively deliver nutrients, and stimulating growth during this time may require more water that may not be readily available. It is best to apply fertilizer during cooler temperatures in earlier seasons. Lastly, be cautious about inadvertently over-fertilizing Wooly Bluecurls by considering the absorption of nearby plants or lawns' fertilizers.

Can artificial lighting supplement sunlight for Wooly Bluecurls?

Yes, artificial lighting can be a vital supplement for Wooly Bluecurls when natural sunlight is insufficient, especially during winter or in less sunny spaces. LED lights are recommended as they can be tailored to provide specific wavelengths needed by the plant. The required intensity varies by plant type: 30-50W/sq ft for full sun plants like Wooly Bluecurls, 20-30W/sq ft for partial sun plants, and 10-20W/sq ft for full shade plants. The artificial light should be placed 12-36 inches above the plant for 8-12 hours a day to mimic natural sunlight conditions.

How much water does my Wooly Bluecurls plant need?

When watering your Wooly Bluecurls, you might be surprised to learn that it doesn't always require a lot of water. Instead, if only a few inches of soil have dried since the last watering, giving it about five to ten ounces of water each time should promote healthy growth. You can also gauge the water volume based on the moisture level of the soil. As mentioned earlier, take note of how many inches of soil have dried out between waterings. To ensure your Wooly Bluecurls gets enough moisture, water until all the layers of dry soil from the previous watering are moistened. If more than half of the soil has dried out, consider giving it more water than usual. In such cases, keep adding water until you see excess water draining from the pot's holes. If your Wooly Bluecurls is planted in an area that receives sufficient rain, it may not require additional watering. When it's young or newly planted, make sure it gets 1-2 inches of rain per week. As it grows and becomes established, it can rely solely on rainwater. Only during hot weather or a period of 2-3 weeks without rainfall should you consider giving it a thorough watering to prevent stress.

What kind of fertilizer does my Wooly Bluecurls plant need?

To help your Wooly Bluecurls thrive, it's important to use fertilizers that provide a balanced mix of the three main plant nutrients, with slightly more phosphorus. Some gardeners choose to enhance the soil by adding compost, worm castings, and manure. Experienced gardeners often add water-soluble fertilizers with phosphorus when the flower buds start to appear, improving flower development, size, and blooming period. Various forms of fertilizers can be suitable, but liquid or powdered forms are considered among the best for Wooly Bluecurls. Remember to dilute the fertilizer and apply it while watering your plant.

What symptoms indicate Wooly Bluecurls is not receiving enough light?

Several symptoms can indicate Wooly Bluecurls is not getting enough light, including smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, and lighter-colored or chlorotic new leaves. Additionally, sunscald, leaf curling, wilting, and leaf scorching can occur when the plant is exposed to excessive sunlight. These symptoms highlight the plant's need for a precise balance in light exposure to maintain its health and vigorous growth.

PLATES
Trichostema lanatum leaf
PLATE 01 · leaf
Trichostema lanatum leaf
PLATE 02 · leaf
Trichostema lanatum flower
PLATE 03 · flower
Trichostema lanatum flower
PLATE 04 · flower
Trichostema lanatum habit
PLATE 05 · habit
Trichostema lanatum habit
PLATE 06 · habit
ALSO IN THE LIBRARY

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