Thymus pulegioides
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Thymus pulegioides

Large thyme · Wild thyme · Lemon thyme · Large-garden · Creeping Thyme

Tier 1 Difficulty: medium Water: low Light: full_sun Toxicity: low
Water every
7 days
Temperature
5–32 °C
Soil pH
6–7
Hardiness
Zone 4–8
Click count
304
Observations
2,025

Description

Source: leafsnap

Thymus pulegioides, common names broad-leaved thyme or lemon thyme, is a species of flowering plant in the family Lamiaceae, native to Europe. Growing to 5–25 cm (2–10 in) tall by 25 cm (10 in) wide, it is a small spreading subshrub with strongly aromatic leaves, and lilac pink flowers in early summer. The specific epithet pulegioides highlights its similarity to another species within Lamiaceae, Mentha pulegium (pennyroyal).

Care Guide

💧 Water Every week

Lemon thyme, a plant native to Europe, thrives in well-drained soil with moderate moisture. It requires weekly watering to keep the soil consistently moist without becoming waterlogged. When grown indoors, lemon thyme adapts well to lower humidity levels and maintains its vitality all year round as an evergreen herb.

Suggested frequency: Every week
FAQ
How should I water my Lemon thyme plant?

Your Lemon thyme is not demanding when it comes to watering. You can use various tools like watering cans, hoses, or even cups to water it. It's important to water directly into the soil, ensuring that all areas receive equal moisture for the entire root system. Consider using filtered water to avoid harmful particles from tap water. Additionally, using water at or slightly above room temperature is preferable, as extremely hot or cold water can shock the Lemon thyme. However, Lemon thyme generally responds well to any water you give it.

What should I do if I give my Lemon thyme too much water or too little water?

Outdoor plants, especially newly planted ones or seedlings, can often suffer from lack of watering. It is important to consistently water these plants for a few months, especially when they are small or recently planted. Once the roots are established, Lemon thyme can usually rely on rain for water. However, when growing Lemon thyme in pots, overwatering becomes a more common problem. If you accidentally overwater your Lemon thyme, take immediate action to address the issue. Stop watering the plant right away to minimize the effects of overwatering. Then, remove the plant from its pot to check the roots. If you find no signs of root rot, you can return the plant to its container. But if you do find root rot, trim away the affected roots and consider applying a fungicide. Finally, repot the Lemon thyme in well-draining soil. On the other hand, if your Lemon thyme is underwatered, simply increase the frequency of watering. Underwatering is usually easy to fix, as the leaves will droop, dry out, and fall off when there is not enough water. The leaves will quickly return to their former fullness after sufficient watering. Make sure to adjust your watering frequency as soon as you notice underwatering.

How frequently should I water my Lemon thyme plant?

Most outdoor plants can survive with natural rainfall. However, if your area lacks rain, you should water them every 2 weeks in the spring and fall. In the summer, you'll need to water them more often. In the winter, when growth is slower, water them less frequently or not at all. If your Lemon thyme is young or newly planted, water it more often to help it establish and become more drought tolerant. For potted plants, there are two ways to determine how often to water your Lemon thyme. One is to follow a set watering schedule, usually once a week or once every other week. However, this may not always be appropriate for your specific growing conditions. Another approach is to check the soil moisture. Wait until the top two to four inches of soil have completely dried out before watering again. This method is especially important during the summer when the plant's water needs are highest.

How much water does my Lemon thyme plant need?

When watering your Lemon thyme, remember that it doesn't always require a lot of water. If only a few inches of soil have dried since the last watering, give it about five to ten ounces of water. You can also base your water volume on soil moisture by observing how many inches of soil have dried out between waterings. To ensure adequate moisture, water enough to moisten all the soil layers that have dried out. If more than half of the soil is dry, give more water until you see excess water draining from the pot's holes. If your Lemon thyme is planted in a rainy outdoor area, it may not need extra watering. For young or newly established Lemon thyme, provide 1-2 inches of rain per week. As it grows, it can rely on rainwater, except in hot weather with no rainfall for 2-3 weeks. In such cases, give it a thorough watering to prevent stress.

How do I know if I'm giving enough water to my Lemon thyme plant?

Lemon thyme can often suffer from overwatering, which is a more common problem. When this happens, there are a few signs to watch out for. Typically, the leaves of an overwatered Lemon thyme will turn yellow and may even fall off. In addition, the plant may shrink in size and can develop root rot. On the other hand, if the Lemon thyme is not receiving enough water, it will start to droop and the leaves may turn brown and become brittle. Regardless of whether you observe signs of overwatering or underwatering, it is important to take action to restore the health of your Lemon thyme.

☀️ Light Full sun

Lemon thyme thrives in full sunlight. It can tolerate periods when light is less plentiful. Native to regions that naturally provide abundant sun, lemon thyme’s metabolism and growth are not hindered by excessive light, nor does the plant suffer harmful effects from a shortage of it.

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

Lemon thyme thrives best in full sun, requiring more than 6 hours of sunlight daily. It can also grow in partial sun, which means about 3-6 hours of sunlight per day. It's essential to watch how sunlight moves through your garden to select spots that offer the right balance of light and shade, ensuring your plants' happiness and optimal growth.

Can Lemon Thyme adapt to different light conditions?

Yes, Lemon Thyme is quite adaptable to varying light conditions. Originating from brightly lit environments, it flourishes under comprehensive exposure to sunlight but can also endure lower light levels. This resilience means its metabolism and growth aren't significantly affected by either an abundance or a lack of light. However, for indoor plants, artificial lighting might be necessary to ensure optimal growth, especially in conditions of insufficient natural sunlight.

How do I use artificial lighting for indoor Lemon Thyme plants?

For indoor Lemon Thyme plants, artificial lighting can be crucial, especially when natural sunlight is insufficient. LED lights are recommended because they can be customized to provide specific wavelengths needed for your plant's growth. Full sun plants need 30-50W/sq ft, partial sun plants 20-30W/sq ft, and full shade plants 10-20W/sq ft of artificial light. The light source should be placed 12-36 inches above the plant, mimicking natural sunlight, and left on for about 8-12 hours per day.

What are some common symptoms of light deficiency in Lemon Thyme?

Common symptoms of light deficiency in Lemon Thyme include smaller new leaves, leggy or sparse growth, faster leaf drop, slower or no new growth, and lighter-colored new leaves. These symptoms indicate that the plant is not receiving enough light, which is crucial for its proper growth and development.

What are the symptoms of too much sunlight on Lemon Thyme?

Too much sunlight can cause symptoms such as chlorosis, where leaves lose their green color; sunscald, which damages leaves or stems; leaf curling as a defense mechanism against excessive sunlight; wilting due to increased water loss; and leaf scorching evidenced by brown or crispy patches on the leaves due to overexposure.

🌡️ Temperature 5–32.2°C

Lemon thyme is native to regions with temperatures ranging from 41 to 90 °F (5 to 32 ℃). It prefers mild conditions and can be acclimated to warmer or cooler temperatures by gradual exposure. Often, adjustments are not necessary during seasonal transitions.

Ideal temperature: 5–32.2°C
FAQ
What is lemon thyme's native climate, and how does it adjust to temperature changes?

Lemon thyme, or Thymus pulegioides, is native to climates with temperatures ranging from 41 to 90 °F (5 to 32 °C). It thrives in mild conditions and can adapt to warmer or cooler temperatures through gradual exposure. Usually, it doesn't require adjustments during seasonal transitions. Lemon thyme has significant cold resistance, and special frost protection measures are generally not needed in winter. However, in exceptionally cold conditions where temperatures are expected to fall below -30°C, protecting the plant by wrapping its trunk and branches with non-woven fabric or cloth is advisable. To further prepare it for winter, it's recommended to water the plant abundantly before the first freeze, ensuring the soil remains moist and is able to enter a frozen state which helps in preventing drought and water scarcity for the plant during the colder months.

What are the symptoms and solutions for lemon thyme exposed to low temperatures?

Lemon thyme is quite tolerant of cold weather, preferring temperatures above 5°C and should ideally be kept above -25°C during winter. When temperatures plunge below -30°C, the branches of lemon thyme may not show immediate damage in winter but can become brittle, dry, and fail to produce new shoots by spring. The solution for handling such damage is to prune away the dead branches in spring to encourage the growth of new leaves, thereby helping the plant to recover from the cold stress.

How does lemon thyme react to high temperatures, and what are the solutions?

During the summer months, it's crucial to keep lemon thyme's temperature below 32°C. Temperatures soaring above 35°C can cause the leaves to lighten in color, with their tips becoming dry and withered, making the plant more prone to sunburn. To mitigate these effects, trim away the sunburned and dried parts of the plant. Moving the plant to a shadier location or using a shade cloth can protect it from the harsh midday and afternoon sun. Additionally, watering the plant during the cooler morning and evening hours helps keep the soil moist, reducing heat stress and promoting healthy growth.

💨 Humidity dry (<40%)

This plant prefers dry conditions, so don't mist it. However, watering it less often can also thrive in higher humidity.

Humidity: dry (<40%)
🪴 Soil 6-7
Soil pH: 6-7
🌱 Fertilizer

To get the best yield and flavor from lemon thyme, provide sufficient nitrogen during the entire growing period, from before planting through to harvest. Plants that are well watered and properly fertilized will produce plentiful, healthy leaves and have reduced bitterness. Before planting, amend the soil with organic material such as compost or manure, preferably 2 to 8 weeks beforehand.

FAQ
Why should I put fertilizer on my Lemon thyme?

To promote beautiful blooms, it is important to fertilize your Lemon thyme. One of the best times to fertilize is early spring to ensure excellent flowers during that season. Additionally, fertilizer provides your Lemon thyme with ample energy for storing during dormant growth phases. Giving extra nutrients during fall planting or late spring will help your Lemon thyme hold more energy for when active growth begins again.

When should I fertilize my Lemon thyme for the best results?

To effectively fertilize Lemon thyme, timing is crucial. Applying fertilizer too early, while the plant is still dormant, will result in ineffective use as it will be washed away by rainwater, causing waste and pollution. The ideal time to begin fertilizing is in early spring. From there, continue to fertilize once a month until early summer.

When is it not a good idea to use fertilizer on Lemon thyme?

To ensure optimal bloom development, it is important to be cautious with the amount of nitrogen fertilizer given to Lemon thyme. Using fertilizer with lower nitrogen levels compared to other nutrients is recommended. Avoid fertilizing after early autumn, as excessive growth right before winter can be detrimental. It is also advised not to fertilize Lemon thyme during hot and dry periods, as dry soil does not effectively deliver fertilizer and can result in stimulated growth that requires more water. Fertilizing during cooler times of the year is preferred. Lastly, be mindful that Lemon thyme can absorb nearby fertilizer, so be cautious of unintentionally providing excess fertilizer to other plants or lawns.

What kind of fertilizer does my Lemon thyme plant need?

To keep your Lemon thyme healthy, you should choose a fertilizer that has a balanced mix of nutrients, with a bit more phosphorus. Adding organic materials like compost, worm castings, and manure can also improve the soil. When the flower buds start to appear, experienced gardeners sometimes add water-soluble fertilizers with phosphorus to help the flowers develop and bloom better. There are many types of fertilizers that can work well for your Lemon thyme, but liquid or powdered forms are often recommended. Regardless of the type you choose, make sure to dilute it and apply it while watering your Lemon thyme.

How should I take care of my Lemon thyme plant?

When using fertilizer for your Lemon thyme, it is important to follow the specific instructions and do some research. Avoid over-fertilizing by determining the correct amount to use. One method is to use the age of the tree or the trunk diameter as a guide. Generally, you can estimate about one-tenth of a pound of fertilizer per year or per inch of trunk, up to a maximum of one pound. To apply the fertilizer, use granular or organic options such as blood meal. Sprinkle the substance around the base of the tree, all the way to the drip line (the outermost branches). Be sure to avoid direct contact with the trunk. Over time, the granules will break down and filter into the soil, where the roots can absorb them. After fertilizing, spread a one-inch layer of compost around the base of the tree and water it thoroughly. This will help provide additional nutrients and support healthy growth.

🪴 Pot & Repot 2-3 years

Repot lemon thyme every 2 to 3 years to support its moderate growth. The best time for repotting is in the spring. Use slightly larger pots filled with well-draining soil. After repotting, make sure the plant gets plenty of sunlight and water it regularly but lightly. Be careful not to overwater, as this can ensure the plant remains healthy and aromatic.

Suggested frequency: 2-3 years
✂️ Pruning

Lemon thyme is a fragrant perennial herb known for its aromatic leaves and pink or lavender flowers. To keep the plant healthy and encourage bushier growth, it's best to prune it in late spring after it has flowered. During pruning, remove any dead stems and trim about one-third of the plant. This will help improve air circulation, reduce the risk of disease, and promote healthy new growth.

🌿 Propagating
🐛 Diseases & pets
☠️ Toxicity

Characteristics

Plant Type
Shrub
Life Cycle
Perennial
Genus
Thymus
Family
Lamiaceae
Hardiness Zone
4-8
Mature Height
25 cm
Mature Spread
25 cm
Leaf Color
Green, Yellow
Leaf Type
Evergreen
Flower Color
Pink, Purple, White
Flower Size
0.51 cm
Bloom Time
Late spring, Early summer, Mid summer
Planting Time
Spring, Autumn
Harvest Time
Mid summer

Tags (6)

Common Names (8)

en Large thyme
en Wild thyme
en Lemon thyme
en Large-garden
en Creeping Thyme
en Large Wild Thyme
en Larger wild thyme
en Broad-leaved Thyme