Glycyrrhiza lepidota

To care for American licorice, it is important to use filtered, room temperature water when watering the plant. Tap water can contain harmful particles, so filtered water is preferred. Since the plant is accustomed to warm environments, using cold water can shock it. It is also best to avoid overhead watering as it can cause problems with the foliage. Instead, water the plant by applying filtered room temperature water directly to the soil until it is fully soaked. This helps moisten the roots and support their spread throughout the soil to collect the necessary nutrients.

Overwatering is a more common issue for American licorice than underwatering. When the plant receives too much water, its stems and leaves may wilt and turn yellow. Prolonged overwatering can lead to diseases like root rot, mold, and mildew, which can be fatal. American licorice has decent drought tolerance, so underwatering is less common. However, when it happens, the leaves may become brittle and brown. It is important to recognize the signs of overwatering early and reduce the watering schedule immediately. If the soil drains poorly, replace it with a well-draining potting mix. If the plant is not receiving enough water, increase watering until the symptoms improve.

If your American licorice plant is in a pot, you can check if it needs water by putting your finger in the soil. If the top two to three inches of soil feel dry, it's time to water it. If you have your American licorice plant in the ground, you can use the same method to check the soil. When the top few inches of soil have dried out, it's time to water it. Usually, during spring and early fall, you'll need to water this plant about once a week using this method. But when it gets really hot, you may need to water it twice a week or even more. However, it's worth noting that mature American licorice plants are quite resilient to drought.

To properly water your American licorice, don't hesitate to give it a generous amount of water. Make sure the first few inches of soil are dry before watering. It's important to thoroughly saturate the soil, allowing excess water to flow through the drainage holes at the bottom of the pot. If no excess water flows out, you may be watering insufficiently. However, be cautious not to let water accumulate in the soil, as this can harm the plant. On the other hand, if water is not draining properly, it may indicate a problem with the soil's drainage. For outdoor plants, receiving 1 inch of rain per week is enough to keep them properly hydrated.

The water requirements of American licorice can vary based on its growth stages. During the initial few years or when it is newly transplanted, more water is needed. This is because the plant focuses on developing new roots to support future growth, which requires extra moisture. As the plant matures, it requires less water. Additionally, during the bloom period, when the flowers are developing, American licorice may need additional water to meet the increased moisture demands.

American licorice thrives best in full sun, requiring more than 6 hours of sunlight daily. However, it can also adapt to partial sun, with about 3-6 hours of sunlight. Ensuring the right amount of sunlight is crucial for the plant’s growth, as it mirrors its natural habitat that is abundant in sunlight. However, moderation is important; both insufficient and excessive sun exposure can adversely affect the plant's health.

When gardening, it's important to observe how sunlight moves through your garden throughout the day. Choosing locations that provide a healthy balance of light and shade is essential for plant happiness and growth. This balance ensures that plants receive the sunlight they need without being exposed to excessive light, which can be harmful.

Indoor plants benefit significantly from adequate lighting, especially when natural sunlight is insufficient, such as in winter or less sunny spaces. Artificial lighting, like LED lights, can be tailored to provide the specific wavelengths needed by plants. The right quantity (30-50W/sq ft for full sun plants, 20-30W/sq ft for partial sun, and 10-20W/sq ft for full shade), distance (12-36 inches above the plant), and duration (8-12 hours per day) of artificial light can mimic natural sunlight conditions, promoting healthier and faster growth.

Incorrect lighting can lead to several symptoms in American licorice, including small or lighter colored new leaves, leggy or sparse growth, faster leaf drop, slower or no growth, and various forms of leaf damage such as chlorosis, sunscald, leaf curling, wilting, and leaf scorching. These symptoms can indicate either too much or too little light exposure, both of which can negatively impact the plant's health and growth.

For indoor American licorice, gradually moving the plant to a sunnier spot or using artificial light can help address light deficiencies. It's recommended to position the plant by a south-facing window or use plant grow lights for at least 8 hours daily to ensure enough light. Outdoors, finding the optimal sunlight spot and avoiding drastic changes in light exposure are key. Additionally, reducing obstructions or transplanting smaller plants to sunnier locations can improve sunlight access. It’s critical to understand that parts of the plant affected by poor light may not recover, but new growth should be healthy following these adjustments.

American licorice thrives in temperatures ranging from 32 to 90°F (0 to 32°C), favoring cooler climates. The plant possesses strong resistance to cold, typically not requiring special frost protection measures in winter. However, in extremely cold conditions where temperatures are expected to drop below -35°C, cold protection should be provided by covering the plant with materials like soil or straw. It is also recommended to water the plant abundantly before the first freeze in autumn to ensure the soil remains moist, helping to prevent drought and water scarcity during winter and early spring.

American licorice is cold-tolerant and generally thrives best in temperatures above 0°C, withstanding winters well. When temperatures fall below -35°C, there might not be noticeable changes during the winter, but these conditions can lead to a decrease in or even lack of sprouting during the spring. To address this issue, in spring, remove any parts of the plant that have failed to sprout.

During the summer months, American licorice should ideally be kept below 32°C. When temperatures exceed 35°C, the plant's leaves may become lighter in color, prone to curling, susceptible to sunburn, and the entire plant may wilt and become dry in severe cases. To mitigate these effects, trim away the sunburned and dried-up parts of the plant. Relocating the plant to a shaded area during the midday and afternoon sun or using a shade cloth can help, as well as watering the plant in the morning and evening to maintain soil moisture.