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Description
Eryngium Glomeratum, also known as the Clustered Sea Holly or Blue Devil, is a species of flowering plant that belongs to the Eryngium genus. It is native to North America and can be found in various regions, including the Great Plains, the Rocky Mountains, and the Pacific Northwest. This unique plant is known for its spiky, ball-shaped clusters of blue flowers that bloom from mid-summer to early fall.
Taxonomic Information
| Domain | Eukarya |
| Kingdom | Plantae |
| Phylum | Spermatophyta |
| Class | Angiospermae |
| Order | Apiales |
| Family | Apiaceae |
| Genus | Eryngium |
Appearance
Eryngium Glomeratum is a medium-sized plant that typically grows between 1 and 3 feet tall. It has a basal rosette of leaves that are deeply lobed and have a spiky texture. The stem is also spiky and is topped with a ball-shaped cluster of blue flowers that can be up to 2 inches in diameter. The flowers are surrounded by a series of spiny bracts that give the plant its unique appearance.
Care Guide
Eryngium Glomeratum is a hardy plant that is relatively easy to care for. Here are some tips to keep your plant healthy:
- Water: This plant prefers well-draining soil and does not like to sit in water. Water it deeply once a week during the growing season, and less frequently during the winter.
- Fertilization: Fertilize your plant once a month during the growing season with a balanced fertilizer.
- Soil: This plant prefers well-draining soil that is rich in organic matter. It does not like heavy clay soils.
- Sunlight: Eryngium Glomeratum prefers full sun to partial shade. It can tolerate some shade, but will not bloom as well.
- Hardiness Zones: This plant is hardy in USDA zones 3 to 9.
Common Pests & Diseases
Eryngium Glomeratum is relatively resistant to pests and diseases. However, it can sometimes be affected by aphids, spider mites, and powdery mildew. Here are some tips to prevent and treat these issues:
- Aphids: These tiny insects can be removed by spraying the plant with a strong stream of water. You can also use insecticidal soap or neem oil to control them.
- Spider Mites: These pests can be controlled by spraying the plant with a mixture of water and dish soap. You can also use insecticidal soap or neem oil.
- Powdery Mildew: This fungal disease can be prevented by ensuring good air circulation around the plant. You can also use a fungicide to treat it.
Habitat
Eryngium Glomeratum is native to North America and can be found in various regions, including the Great Plains, the Rocky Mountains, and the Pacific Northwest. It typically grows in dry, open areas such as prairies, meadows, and rocky slopes.
Question and Answer
Q: Is Eryngium Glomeratum a good plant for beginners?
A: Yes, Eryngium Glomeratum is a relatively easy plant to care for and is a good choice for beginners.
Q: Can Eryngium Glomeratum be grown in containers?
A: Yes, Eryngium Glomeratum can be grown in containers as long as they are large enough to accommodate the plant’s root system.
Q: Does Eryngium Glomeratum attract pollinators?
A: Yes, Eryngium Glomeratum is a great plant for attracting pollinators such as bees and butterflies.
Q: How often should Eryngium Glomeratum be pruned?
A: Eryngium Glomeratum does not require regular pruning. However, you can deadhead the spent flowers to promote more blooms.
Related Plants
- Eryngium Planum
- Eryngium Alpinum
- Eryngium Yuccifolium
- Eryngium Foetidum
References
- “Eryngium Glomeratum.” Missouri Botanical Garden. https://www.missouribotanicalgarden.org/PlantFinder/PlantFinderDetails.aspx?kempercode=c527
- “Eryngium Glomeratum.” Plant Care Today. https://plantcaretoday.com/eryngium-glomeratum.html
- “Eryngium Glomeratum.” North Carolina Extension Gardener Plant Toolbox. https://plants.ces.ncsu.edu/plants/eryngium-glomeratum/
