Scutellaria galericulata
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Scutellaria galericulata

Marsh scullcap · Skullcap · Hooded Skullcap · Hierba de la Celada · Marsh Skullcap

Tier 1 Difficulty: medium Water: low Light: full_sun Toxicity: low
Temperature
5–32 °C
Soil pH
6–7
Hardiness
Zone 4–8
Click count
157
Observations
1,025

Description

Source: leafsnap

Scutellaria galericulata, the common skullcap, marsh skullcap or hooded skullcap, is a hardy perennial herb native to northern areas of the Northern Hemisphere, including Europe, Asia, and almost all of Canada. It is a member of the mint family. The form is upright and is usually 20-45 centimeters in height, sometimes reaching up to 80 cm. It is a wetland-loving species and grows along fens and shorelines. The blue flowers are 1 to 2 centimeters long. The flowers are in pairs and are all on the same side of the stem. The flowers do not appear at the top of the stem. The plant is native to many parts of the world and, as such, is known by a variety of names. The Latin galericulata means "hooded", relating to the length of the flower's tube being much longer than the calyx. The variation epilobiifolia translates as leaves like willow-herb, and refers to the slightly serrated long thin leaves which look similar to those of the genus Epilobium.

Care Guide

💧 Water

Skullcap, originally from wetland areas, thrives in conditions with consistent moisture and damp soil. It can tolerate brief periods of water saturation. To mimic its natural habitat, watering it weekly is ideal. Typically grown outdoors, skullcap flourishes in moist soil, which promotes lush growth during the growing season.

FAQ
How should I water my Skullcap plant?

To ensure the health of your Skullcap plant, it is recommended to use filtered water at room temperature. Tap water may contain harmful particles that can affect the plant. The Skullcap originates from a warm environment, so it is best to avoid using cold water, which can be a shock to the plant. Instead of overhead watering, it is better to apply filtered, room temperature water directly to the soil until it is fully soaked. This helps to moisten the roots and support their growth and nutrient absorption in the soil.

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

It's important to note that both overwatering and underwatering can harm your Skullcap plant, but overwatering is more common. When this plant gets too much water, its stems and leaves may wilt and turn yellow. Overwatering for a long time can also lead to diseases like root rot, mold, and mildew, which can be deadly. Underwatering is less likely with the Skullcap because it can handle dry conditions, but it can still happen. In this case, the leaves may become brittle and brown. To take care of your Skullcap, it's essential to notice signs of overwatering early on. Diseases like root rot may not be fixable if you wait too long. If you see the early signs of overwatering, reduce your watering schedule right away. Also, check the quality of the soil where your plant is growing. If it drains poorly, replace it with a loose, well-draining potting mix. On the other hand, if you suspect your Skullcap isn't getting enough water, increase your watering frequency until the signs improve.

How frequently should I give water to my Skullcap plant?

If your Skullcap plant is in a pot, the most precise way to determine if it needs water is to put your finger in the soil. If the top two to three inches of soil feel dry, it's time to water it. The same method applies if you grow Skullcap outdoors in the ground. When the top few inches of soil are dry, it's time to water. Typically, during spring and early fall, watering once a week is sufficient. However, during extremely hot weather, you may need to water twice a week or more. Keep in mind that mature, well-established Skullcap plants are impressive when it comes to surviving drought conditions.

How much water does my Skullcap plant require?

When watering your Skullcap plant, it's important to be generous with the amount of water you give. Make sure the top two to three inches of soil are dry before watering, and then thoroughly soak the soil. The water should be enough to cause excess water to flow out of the drainage holes at the bottom of the pot. If you don't see any excess water draining, it means you haven't watered enough. On the other hand, be careful not to let water accumulate inside the soil, as this can harm the plant. If no water is draining, it could be due to poorly draining soil, which is bad for the plant's health. If the plant is outside, receiving about 1 inch of rain per week should be enough.

How do I water my Skullcap when it's at different stages of growth?

The water requirements of the Skullcap can change depending on its growth stages. In the first few years of its life or when it is freshly transplanted, it will need more water than usual. This is because during these stages, the Skullcap focuses on developing new roots to support future growth, and these roots require extra moisture. As the Skullcap matures, it will need less water. Another growth stage that requires increased watering is during the bloom period. Flower development utilizes a substantial amount of moisture, so it is important to provide more water to the Skullcap at this time.

☀️ Light Full sun

Skullcap thrives in places with steady exposure to sunlight. Sunlight is essential for its growth and development, supporting it through each stage. Native to environments with ample sunshine, it struggles when light is scarce. Both too much and too little sunlight can damage its health.

Ideal: Full sun
FAQ
What are the sunlight requirements for Skullcap?

Skullcap requires full sun, meaning it thrives in areas receiving more than 6 hours of sunlight daily. However, it can also grow in partial sun, which is about 3-6 hours of sunlight. Ensuring the right balance of light and shade is crucial for the plant's health, as both overexposure and deficiency might hinder its growth. Observing how sunlight moves through your garden can help choose the best spots for planting, ensuring the plants' happiness.

How essential is sunlight for Skullcap's growth?

Sunlight is fundamental for Skullcap's growth and development. Originating from habitats abundant in sunshine, Skullcap flourishes in areas with continuous exposure to the sun. Inadequate light can severely affect its health, emphasizing the need for proper sunlight or artificial lighting solutions, especially in environments where natural light is insufficient.

What are the solutions for providing sufficient light to indoor Skullcap plants?

For indoor Skullcap plants requiring more light, artificial lighting is a practical solution. When natural sunlight is scarce, especially during winter or in less sunlit spaces, indoor plants can benefit from artificial lights. Opting for LED lights, which can be tailored to specific plant needs, is advisable. Full sun plants need 30-50W/sq ft of light, partial sun plants require 20-30W/sq ft, and full shade plants need 10-20W/sq ft. Placing the light source 12-36 inches above the plant and ensuring it receives 8-12 hours of light per day mimics natural sunlight conditions optimally.

What are common symptoms of insufficient light in Skullcap?

Symptoms of light deficiency in Skullcap include smaller new leaves compared to mature ones, leggy or sparse growth, faster leaf drop, slower or halted growth, and lighter-colored or irregularly patterned new leaves. These signs indicate that the plant is struggling with inadequate sunlight, affecting its overall health and ability to photosynthesize properly.

How can I address overexposure to sunlight in Skullcap?

Overexposure symptoms in Skullcap, such as chlorosis, sunscald, leaf curling, wilting, and leaf scorching, suggest damage from intense sunlight. Managing these conditions involves adjusting the plant's exposure to sunlight by providing partial shade or gradually acclimating the plant to bright conditions, careful watering to prevent dehydration, and potentially applying protective materials to shield the plant from the most intense sun rays.

🌡️ Temperature 5–32.2°C

Skullcap is native to areas with a temperate climate and grows best in temperatures between 41 and 89.6 °F (5 to 32 ℃). Large temperature swings can cause stress or damage. It is advisable to adjust care seasonally by using warmer coverings or cooler shading.

Ideal temperature: 5–32.2°C
FAQ
What is the native climate for Skullcap and how should it be cared for throughout the seasons?

Skullcap, botanically known as Scutellaria galericulata, thrives in moderate climates, ideally in temperatures ranging from 41 to 89.6 °F (5 to 32 °C). It is important to adjust care according to seasonal variations to help the plant cope with extreme temperature fluctuations. This might involve using warmer coverings or cooler shadings to protect the plant. Skullcap possesses strong cold resistance, meaning special frost protection measures are generally not necessary during winter. However, if temperatures are expected to drop below -30°C, cold protection should be provided by covering the plant with soil or straw. Additionally, watering the plant abundantly before the first freeze in autumn is recommended to ensure the soil remains moist and enters a frozen state, preventing drought and water scarcity during the winter and early spring.

How does low temperature affect Skullcap, and what are the solutions for any damage caused?

Skullcap is cold-tolerant, thriving best in temperatures above 5°C and should be kept above -25°C during winter. When temperatures fall below -30°C, there may not be noticeable changes during the winter, but there could be a decrease in sprouting or even a lack of sprouting in spring. The solution to address any springtime damage due to low winter temperatures is to remove any parts of the plant that have failed to sprout.

What impact does high temperature have on Skullcap, and what solutions can mitigate damage?

During summer, it's crucial to keep Skullcap's temperature below 32°C. Should the temperature exceed 35°C, the plant's leaves may lighten in color, become prone to curling, susceptible to sunburn, and in severe cases, the entire plant may wilt and dry out. To mitigate such damage, sunburned and dried-up parts should be trimmed away. Moving the plant to a shaded location or using a shade cloth to protect it from the midday and afternoon sun can also help. Additionally, watering the plant in the morning and evening to maintain soil moisture can prevent or minimize damage.

💨 Humidity
Humidity:
🪴 Soil 6-7
Soil pH: 6-7
🌱 Fertilizer

The best time to fertilize a Skullcap is in early spring, as it comes out of dormancy and begins active growth. Fertilization supplies essential nutrients for healthy development. Although Skullcap has relatively low fertilizer requirements, feeding it annually can improve its survival and encourage better, longer-lasting flowers.

FAQ
Why is it important to add fertilizer to my Skullcap plant?

The main structure of the Skullcap is made up of its leaves. To ensure that the leaves look great and serve their function, fertilization is essential. Proper fertilization will help the Skullcap maintain consistent leaf color and a healthy texture. Additionally, fertilization below the soil's surface promotes the growth of new roots and maintains existing ones in the root system. This means that fertilization not only keeps the plant healthy currently, but also improves its ability to absorb soil nutrients in the future.

When should I put fertilizer on my Skullcap plant?

If you grow your Skullcap outdoors, it will produce new growth in early spring. When you see the leaves emerge, that's the signal to start fertilizing for the year. Usually, one application of fertilizer in spring is sufficient for the plant to thrive. However, if you want to maximize its growth, you can fertilize it multiple times throughout spring and early summer. In this case, feed your Skullcap roughly once every month to a month and a half.

When is it not a good time to fertilize my Skullcap plant?

During late fall and winter, your Skullcap will go into a dormant phase where it stops producing new growth. Thus, it is best to avoid fertilizing your Skullcap during this time. In the spring and summer, if you choose to fertilize, gradually reduce the amount as summer approaches because the growth rate of your Skullcap will decrease. In general, it is not recommended to fertilize your Skullcap during extremely hot weather or when the soil is excessively dry. Fertilizing in such conditions can stress your Skullcap and lead to premature death.

What kind of fertilizer does my Skullcap plant need?

Choosing the right fertilizer for a Skullcap plant is actually quite simple. You just need a general-purpose garden fertilizer with equal parts nitrogen, phosphorus, and potassium, typically found in a 10-10-10 ratio. Avoid fertilizers with excessive nitrogen. The best fertilizers for Skullcap usually come in granular form and should be slow-release for easy application. Additionally, using an organic soil amendment like compost can be beneficial for feeding your Skullcap.

How should I give nutrients to my Skullcap plant?

To ensure the growth of your Skullcap plant in early spring, wait until you see the first leaves poking through the soil. Once you notice this, apply a balanced formula granular slow-release fertilizer to the soil around the base of the plant. If desired, you can repeat this process later in the season. When applying fertilizer, remember to target the soil rather than the plant itself. You may need to move some leaves aside to access the soil above the roots. Additionally, watering your Skullcap before and after feeding it is recommended.

🪴 Pot & Repot
✂️ Pruning

To improve the growth and bloom of skullcap, a plant known for its vibrant blue flowers and sturdy stems, it's best to prune it from early to late spring. Pruning during this time encourages a bushier plant and more abundant blooms by removing dead stems and spent flowers. Additionally, it rejuvenates older growth and promotes overall vigor. For the best results, make sure to use clean, sharp tools when pruning.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Characteristics

Plant Type
Herb
Life Cycle
Perennial
Genus
Scutellaria
Family
Lamiaceae
Hardiness Zone
4-8
Mature Height
20 cm to 76 cm
Mature Spread
15 cm to 61 cm
Leaf Color
Green, Dark Green
Leaf Type
Deciduous
Flower Color
Purple, Blue
Flower Size
2.54 cm
Bloom Time
Summer
Planting Time
Spring, Summer, Autumn
Harvest Time
Late summer, Early fall, Mid fall
Native Area
Turkey, Sweden, India, Austria, Slovakia, Montenegro, Pakistan, Slovenia, Croatia, Belarus, Uzbekistan, Russia, Germany, Estonia, Romania, Latvia, Belgium, Portugal, Netherlands, France, Tajikistan, Czech Republic, Bulgaria, Armenia, Poland, Greece, Ukraine, Serbia, China, Lithuania, Norway, Kyrgyzstan, Kazakhstan, Italy, Spain, Switzerland, Denmark, Mongolia, Finland, Iran, Albania, Ireland, United Kingdom, Hungary, Azerbaijan, Turkmenistan

Tags (12)

Common Names (8)

en Marsh scullcap
en Skullcap
en Hooded Skullcap
en Hierba de la Celada
en Marsh Skullcap
en Common scullcap
en Common skullcap
en Blue skullcap