Hymenoxys grandiflora is a North American species of flowering plant in the daisy family known by the common names graylocks four-nerve daisy, graylocks rubberweed, or old man of the mountain. It is native to high elevations in the Rocky Mountains of the western United States, in the states of Montana, Idaho, Wyoming, Utah, Colorado, and New Mexico. Hymenoxys grandiflora is a perennial herb up to 30 cm (1 foot) tall. One plant generally produces one flower head per stem, up to 10 per plant. Each head has 15–44 ray flowers and 150–400 disc flowers.
Old man of the mountains has good disease resistance and is generally not prone to illnesses. However, it can be susceptible to pests and diseases present in its surroundings. These infections are usually not severe. Regarding care, this plant requires moderate maintenance. It needs regular pruning to keep a neat appearance and support healthy growth. Fertilizing can also help encourage flowering. Old man of the mountains is suitable for anyone with an outdoor area, such as a garden or patio, and does not demand much prior care experience. It may need more attention when grown indoors.
How to keep Hymenoxys Grandiflora.
Light
Old man of the mountains is a sun-loving perennial herbaceous species native to open habitats, commonly found in meadows and grasslands. It favors full sun but can also tolerate partial sun.
Fertilizer
For Old man of the mountains, the primary time to apply fertilizer is early spring when the flowers are developing. Using the proper fertilizer fosters better blooms and helps Old man of the mountains produce attractive flowers. Fertilizing in early spring ensures strong flowering during the season and supplies energy for dormant growth stages.
Pruning
The "Old Man of the Mountains" flourishes in mountainous areas, boasting vibrant yellow flowers. To encourage healthier growth and more blooms, prune it in early spring. During pruning, remove dead stems and shape the plant as needed. Be sure to use sharp, sterilized tools to make clean cuts, which will improve air circulation and reduce the risk of disease.
Botanical profile.
- Plant Type
- Herb
- Life Cycle
- Perennial
- Genus
- Hymenoxys
- Family
- Asteraceae
- Hardiness Zone
- 3-7
- Mature Height
- 0 cm to 30 cm
- Mature Spread
- 15 cm to 30 cm
- Leaf Color
- Green, Dark Green
- Leaf Type
- Deciduous
- Flower Color
- Yellow, Gold
- Flower Size
- 5.08 cm to 7.62 cm
- Bloom Time
- Early summer, Mid summer
- Planting Time
- Spring, Summer
- Harvest Time
- Late summer, Early fall
Other names.
