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Illustration of a fresh spearmint leaf on a white background.

Spearmint

SCENTIFIC NAME: Mentha spicata

ALSO KNOWN AS: Garden Mint, Common Mint

PLANT FAMILY: Mint Family (Lamiaceae)

CLIMATE (LOCATION): Europe | Temperate

DESCRIPTION: Spearmint is a type of fragrant herb in the mint family. It has a pleasant, sweet, and slightly minty flavor. Spearmint leaves are often used to flavor chewing gum, prepare herbal tea, and lend a pleasant flavor to a variety of dishes and beverages. 

Easy difficulty & pet toxic

Spearmint Plant Care

Lighting

Light Requirement: Full Sun (Bright Direct Light) & High Light (Bright Indirect Light)

Spearmint plants can be grown in bright or moderate, indirect light conditions. However, the leaves will have the most flavor when grown in full sun (bright, direct light). The spearmint leaves will produce more oil will stronger sunlight. Placing your spearmint in a south-facing window will supply suitable lighting. Spearmint can also be grown with an LED grow light if natural lighting is not easily accessible.

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Watering

Quick Tip: Water until water comes out of drainage holes. Allow top 2 inches of soil to completely dry between waterings.

For spearmint to thrive successfully indoors, proper irrigation is essential. Try to maintain a constant moisture level in the soil that is not wet. When the top inch of soil seems dry to the touch, water the plant. Make sure the water gets to the root zone by properly moistening the soil using a watering can or sprayer. Overwatering should be avoided as it might cause root rot and other moisture-related problems. To avoid waterlogging, drain extra water from the saucer or tray under the plant. It's vital to remember that depending on variables like temperature, humidity, and pot size, the frequency of watering may change. Keep a close eye on the soil's moisture content and adjust the watering schedule as necessary. Additionally, since it can help avoid fungal problems, spearmint loves a minor drying out in between waterings. You can adequately hydrate your indoor spearmint plant and promote its healthy growth by using these watering techniques.

Temperature

Preferred Temperature: 60º - 75º

Spearmint grows best in indoor temperatures that mimic its natural habitat. When growing spearmint indoors, the ideal temperature range is between 65°F (18°C) and 75°F (24°C) during the day and about 60°F (15°C) at night. Extreme temperature changes should be avoided, and the plant should not be exposed to drafts, direct cold, or direct heat sources. Spearmint can survive a little bit cooler temperatures, especially in the winter, but it should be covered from below-freezing temperatures because it is vulnerable to frost. Your indoor spearmint plant will grow healthily, produce foliage, and develop flavor if you maintain a consistent, moderate temperature throughout the year.

Humidity

Preferred Humidity: 40 - 60%; Moderate Humidity

Spearmint plants are generally best in humidity between 40% and 60%. Spearmint plants prefer moderate humidity levels but can tolerate variations. They thrive in environments with adequate moisture, but excessive humidity can increase the risk of fungal diseases. To maintain suitable humidity for spearmint, provide good air circulation, avoid overwatering, and ensure proper drainage to prevent waterlogged soil. If the air is too dry, misting the leaves or using a humidifier can help raise humidity levels. Regularly monitoring and adjusting humidity conditions will contribute to the healthy growth of spearmint plants.

Additional Plant Care

How to Propagate a Spearmint Plant
Spearmint can be propagated using stem cuttings. Pick a spearmint plant that is mature and healthy if you want to reproduce it. Take a 4-6 inch stem cutting just below a leaf node with clean, well-kept scissors or pruning shears. Leave a couple of sets of leaves at the top after removing the lower leaves. To promote the growth of roots, dip the cut end of the stem in a rooting hormone (optional). Make sure that at least one or two nodes are buried in the soil when you plant the cutting in a well-draining potting mix. Place the pot away from direct sunlight in a warm, well-lit place. Maintain continuous soil moisture without letting it become soggy, and sometimes spritz the cutting to keep the humidity up. New growth and the emergence of roots should occur within a few weeks. The cutting can be transplanted to a bigger container or the garden once it has developed roots and is actively developing. You can effectively cultivate spearmint and have a constant supply of this fragrant plant by according to these propagation procedures.
Toxicity
Spearmint is considered safe for human consumption and is widely used as a culinary herb. It has a long history of safe use in food and beverages. However, it's important to note that individual sensitivities or allergies can vary. Some individuals may experience mild allergic reactions or digestive discomfort when consuming spearmint or other herbs. When it comes to pets, its best to avoid any mint species. If you think your pet has ingested mint leaves, it's best to contact a veterinarian for guidance.
Repotting
Because spearmint has a tendency to spread and needs space for its roots, start by choosing a somewhat larger pot with sufficient drainage holes. Water the spearmint well before repotting to aid in loosening the root ball and make it easier to remove from the present pot. Take care not to harm the plant's roots when you carefully remove the spearmint plant from its container. Make sure the top of the root ball is level with or just below the pot's rim before setting the plant in the new container and covering the area with well-draining potting soil. To keep the plant in place, lightly press the earth. After repotting, water the spearmint to hydrate the soil and help it settle. Put the pot in a bright area or near grow lights. Keep an eye out for signs of stress in the plant and modify watering frequency as necessary to keep the soil equally moist but not soggy. By adhering to these repotting guidelines, you can guarantee a smooth transfer for your spearmint plant, encourage strong root development, and provide the ideal growing environment.
Seeding
Sow the spearmint seeds in well-draining soil, keeping them moist until germination occurs. Choose a sunny or partially shaded spot in your garden or use a pot for convenient indoor cultivation. With proper care and regular watering, you'll soon be enjoying the aromatic leaves of your very own spearmint plant.
Pruning
Every four to six weeks during the growing season, spearmint plants should be pruned back to a height of about 2-3 inches above the earth or soil. Remove the top portion of the stems, which is immediately above a set of leaves or a set of leaf nodes, using clean, sharp scissors or pruning shears. This stops the plant from getting lanky or sprawling and fosters new growth from the plant's roots. Additionally, keeping the plant's general health in check involves removing any yellowed or damaged leaves. Regular leaf collection for culinary purposes acts as a form of trimming and promotes ongoing development. To allow the plant to save energy for winter dormancy, pruning should not be done too late in the growing season. You may help keep your spearmint plant compact, fruitful, and aesthetically pleasing by adhering to this routine pruning schedule.
Fertilizing
Regular fertilizing promotes spearmint growth and flavor. Applying a balanced, water-soluble fertilizer with a greater nitrogen concentration, such as a 10-10-10 or 20-10-10 formulation, every four to six weeks during the growing season is the ideal fertilizing technique for spearmint. Once the plant has established itself, usually a few weeks after planting, start fertilizing. Apply the fertilizer to the soil around the plant's base after diluting it as directed on the package. Do not overfertilize because too much nitrogen might cause sluggish growth and a loss of flavor. A slow-release source of nutrients, such as compost or well-rotted manure, should also be added to the plant as a supplement. Check for any indicators of nutrient deficiency in the spearmint plant, such as yellowing leaves, and change the fertilization frequency or strength as necessary. Maintaining a regular fertilizer schedule can encourage strong development and improve the flavor of your spearmint plant.
Soil
Giving spearmint the best soil conditions is essential for its effective indoor production. To guarantee optimum water drainage and aeration, use a well-draining potting mixture that contains a combination of peat moss, perlite, and vermiculite. With a pH of 6.0 to 7.0, spearmint prefers slightly acidic to neutral soil. Composting or adding well-rotted manure to the soil can help it become more fertile and nutrient-rich. Because spearmint grows quickly, pick a larger pot to accommodate its propensity for spreading. In order to avoid waterlogging, make sure the pot includes drainage holes. You may establish the perfect soil condition for indoor spearmint development by supplying well-draining soil with a pH range of slightly acidic to neutral and keeping the proper moisture levels.

Hanging Heights

Spearmint Lighting Requirements: Full Sun (Bright Direct Light) & High Light (Bright Indirect Light)

Chart showing recommended hanging heights for Soltech Aspect and popular plants for each range.

Aspect Hanging Heights - Spearmint

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Soltech's Recommendation -

36" to 60"

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VIEW ASPECT GROW GUIDE

Vita Hanging Heights - Spearmint

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Soltech's Recommendation -

36º Narrow Beam Vita : 36" to 80"

60º Wide Beam Vita : 24" to 48"

-

VIEW VITA GROW GUIDE

Highland Hanging Heights - Spearmint

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Soltech's Recommendation -

36º Narrow Beam Highland : 18" to 42"

60º Wide Beam Highland : 30" to 72"

-

VIEW HIGHLAND GROW GUIDE

Grove Hanging Heights - Spearmint

-

Soltech's Recommendation:

  • 1" to 24"

-

VIEW GROVE GROW GUIDE

Lighting guide for plants with Soltech Aura and potted plants on a neutral background

Aura Light Distances - Spearmint

-

Soltech's Recommendation:

  • 0" to 8"

-

VIEW AURA GROW GUIDE

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