Eryngium campestre, known as field eryngo, or Watling Street thistle, is a species of Eryngium, which is used medicinally. A member of the family Apiaceae, eryngo is a hairless, thorny perennial plant. The leaves are tough and stiff, whitish-green. The basal leaves are long-stalked, pinnate and spiny. The leaves of this plant are mined by the gall fly, Euleia heraclei.
Field eryngo shows good resistance to disease and generally is not susceptible to illnesses. Still, it can be affected by pests and diseases present in its environment, though such infections tend to be mild. Regarding care, it needs a moderate level of maintenance. Regular pruning is necessary to preserve a neat appearance and healthy growth, and feeding it can help stimulate flowering. Field eryngo is well suited to anyone who has outdoor space, like a garden or patio, and does not demand extensive care experience. It may, however, require more attention if kept indoors.
How to keep Eryngium Campestre.
Light
Field eryngo thrives in a setting with abundant sunlight. A site that provides full sun all day is ideal for its healthy growth. It can, however, tolerate periods of reduced light. Insufficient light is less harmful than too much, which can cause it to wither.
Water
Field eryngo flourishes in moderately moist environments and prefers soil that maintains consistent moisture without becoming waterlogged. This drought-tolerant herbaceous perennial thrives when watered weekly and benefits from rain during its growing season, as this aligns with its natural water cycle.
Temperature
The field eryngo naturally occurs in environments with temperatures ranging from 41 to 95 °F (5 to 35 ℃). It favors moderate climates but can tolerate temperatures within that range. Seasonal temperature adjustments may not be necessary.
Fertilizer
For Field eryngo, the primary time to fertilize is early spring, when flowers are beginning to form. The correct fertilizer promotes stronger blooms and helps Field eryngo produce attractive flowers. Fertilizing in early spring ensures good flowers during the season and provides energy for dormant growth phases.
Pruning
Field eryngo is a spiky perennial known for its serrated leaves and thistle-like blooms. To encourage growth and vibrant flowers, prune the plant from early to late spring. Be sure to remove any dead foliage and spent blooms to improve air circulation. Regular pruning not only enhances the plant's resilience but also extends its blooming season. Remember to wear gloves for protection while pruning.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Perennial
- Genus
- Eryngium
- Family
- Apiaceae
- Hardiness Zone
- 5-9
- Mature Height
- 61 cm
- Mature Spread
- 49 cm
- Leaf Color
- Green Yellow, Yellow Green
- Leaf Type
- Deciduous
- Flower Color
- White
- Flower Size
- 0.51 cm to 1.02 cm
- Bloom Time
- Summer
- Planting Time
- Spring, Autumn, Winter
- Harvest Time
- Late summer, Early fall, Mid fall
- Native Area
- Libya, Egypt, Turkey, Austria, Slovakia, Montenegro, Croatia, Slovenia, Morocco, Belarus, Russia, Germany, Romania, Belgium, Moldova, Netherlands, France, Portugal, Tunisia, Czech Republic, Bulgaria, Armenia, Poland, Greece, Ukraine, Lebanon, Serbia, Syria, Italy, Spain, Switzerland, Iran, Albania, Azerbaijan, Algeria, Hungary
Other names.
Reader questions.
How should I water my Field eryngo?
To ensure the health of the Field eryngo while watering, it is best to use filtered water at room temperature. Tap water may contain harmful particles for this plant. The Field eryngo is adapted to warm environments, so using cold water can be a shock. Additionally, it is recommended to avoid overhead watering to prevent complications with the foliage. Instead, gently apply filtered room temperature water directly to the soil until it is completely soaked. This method benefits the plant by providing moisture to the roots and assisting their spread for nutrient absorption in the soil.
Why should I add fertilizer to my Field eryngo?
The leaves of the Field eryngo are key to its overall appearance and function. Fertilizing is essential to maintain the leaves' color and health. Proper fertilization also promotes root growth and strengthens the existing root system. This not only ensures immediate plant health but also enhances its ability to absorb nutrients from the soil over time.
What are the sunlight requirements for Field eryngo?
Field eryngo thrives in environments with plentiful sunlight and is ideally placed in spots that are exposed to sun all day for optimal growth. Although it can endure some lack of light, it needs more than 6 hours of sunlight a day to flourish. When planning where to place your plant, observe the sunlight movement through your garden to find a location that offers a balance of light and shade, ensuring your plant's happiness.
What is the ideal temperature range for Field eryngo?
Field eryngo naturally thrives in environments with temperatures ranging between 41 to 95 °F (5 to 35 °C). It is a plant that prefers moderate climates but can tolerate a wide range of temperatures within the specified range. This resilience means that seasonal temperature adjustments are often not necessary for its growth. Despite its strong resistance to cold, in regions where winter temperatures are anticipated to drop below -25°C, it is crucial to take measures to protect the plant from frost. This can include covering the eryngo with soil or straw to insulate it. Additionally, before the onset of the first freeze in autumn, it's advisable to water the plant abundantly to ensure the soil stays moist and enters the freezing state prepared, which helps prevent drought stress during the colder months.
What should I do if I give too much or too little water to my Field eryngo?
Overwatering is a common issue for Field eryngo, and it can cause wilting, yellowing, and potentially deadly diseases like root rot, mold, and mildew. Underwatering, although less common, can still occur and result in brittle, brown leaves. To ensure the health of your Field eryngo, it's important to recognize the signs of overwatering early and reduce watering immediately. If the soil drains poorly, replace it with a well-draining potting mix. If signs of underwatering are present, simply water more frequently until the signs disappear.
When should I fertilize my Field eryngo?
If you grow your Field eryngo outdoors, each year the plant will start new growth in early spring. This is when you should begin fertilizing for the year. Usually, a single application of fertilizer in the spring is enough for a Field eryngo to grow well. However, if you want to optimize its growth, you can fertilize multiple times throughout spring and early summer. If you choose this option, you can feed your Field eryngo about once every month to a month and a half.
How can artificial lighting assist in the growth of Field eryngo indoors?
Indoor plants like Field eryngo require adequate lighting for optimal growth, especially when natural sunlight is insufficient, such as in winter or in less sunny spaces. Artificial lighting can provide a vital solution. LED lights are popular for indoor plant lighting as they can offer specific wavelengths needed by plants. For full sun plants, 30-50W/sq ft of artificial light is needed, partial sun plants require 20-30W/sq ft, and full shade plants need 10-20W/sq ft. The artificial light source should be placed 12-36 inches above the plant to mimic natural sunlight, and most plants will need 8-12 hours of light per day.
How does Field eryngo respond to low temperatures, and what are the recommended solutions?
Field eryngo is notably cold-tolerant, performing best in temperatures above 5°C. However, despite its resilience, during winter, it is advisable to keep its environment above -20°C to avoid damage. When the temperature dips below -25°C, there might not be immediate visible changes during winter, but one may observe a decrease in sprouting, or in some cases, no sprouting at all come spring. To counteract any ill effects of extremely low temperatures, in spring, it is advised to remove any plant parts that have failed to sprout, encouraging healthier growth and recovery from the cold stress.
How frequently do I need to water my Field eryngo?
If your Field eryngo plant is in a pot, you can determine if it needs water by sticking your finger into the soil. When the top two to three inches of soil feel dry, it's time to water it. Similarly, if you grow your Field eryngo outside in the ground, you can use the same method to check the soil. Once the top few inches of soil have dried out, it's time to water. Typically, during spring and early fall, watering once a week should be sufficient. However, during extremely hot weather, you may need to water twice a week or even more. Nevertheless, mature and well-established Field eryngo plants have a remarkable ability to tolerate drought.
When is the best time to not fertilize my Field eryngo?
During the late fall and winter, your Field eryngo will go into a dormant phase with no new growth. Therefore, it is not recommended to fertilize it during this time. In the spring and summer, if you choose to fertilize, start reducing the amount as summer approaches since the growth rate of the Field eryngo will also slow down. Generally, it is not a good idea to fertilize your Field eryngo during extremely hot weather or when the soil is excessively dry. Fertilizing in these conditions can potentially stress your Field eryngo and cause it to die prematurely.
What are the signs of insufficient light for Field eryngo?
When Field eryngo does not receive adequate light, it may exhibit various symptoms indicating light deficiency. New leaves might grow smaller, and the plant may develop leggy or sparse growth with longer spaces between leaves or stems, making it appear weak and stretched-out. Early leaf drop can occur as the plant tries to conserve resources, leading to slowed or halted growth. Insufficient sunlight can also cause new leaves to develop irregular color patterns or appear pale, indicating a lack of chlorophyll and essential nutrients. Such signs help diagnose light-related issues with your Field eryngo.
What steps should be taken if Field eryngo experiences high temperatures?
During the summer season, it's crucial to ensure that the Field eryngo's environment does not exceed 35°C. Exposure to temperatures above 38°C may lead to the plant's leaves becoming lighter, prone to curling, experiencing sunburn, and in severe cases, the entire plant may wilt and dry out. To mitigate these high temperature effects, it is recommended to trim away the sunburned and dried-up parts of the plant. Relocating the plant to a shadier location or employing a shade cloth can provide protection from the midday and afternoon sun. Additionally, watering the plant during the cooler morning and evening hours helps keep the soil adequately moist, further supporting the plant's health and resilience against high temperature stress.