The Blue Star Juniper on Standard, or Juniperus squamata 'Blue Star' on standard, is a unique and attractive ornamental plant that features a dwarf, compact evergreen shrub grafted onto a standard (a straight trunk). Here are some key points about this plant:

1. Appearance: The Blue Star Juniper is known for its dense, conical form and stunning blue-green foliage. It typically grows as a low, spreading shrub, but when grafted onto a standard, it creates a more upright, tree-like appearance.

2. Size: The size of the Blue Star Juniper on Standard can vary depending on the specific cultivar and the height of the standard trunk. Generally, the standard trunk can range from 2 to 4 feet in height, with the grafted juniper adding additional height and width to the overall plant.

3. Light and Soil Requirements: Blue Star Junipers prefer full sun to partial shade and well-drained soil. They are drought-tolerant once established and are relatively low-maintenance plants.

4. Watering: Regular watering is essential, especially during the establishment period. Once established, Blue Star Junipers are quite drought-tolerant and typically only require occasional watering during dry periods.

5. Pruning: Pruning is generally minimal for Blue Star Junipers. You may need to trim back any dead or damaged branches and occasionally shape the plant to maintain its desired form.

6. Year-Round Interest: One of the main attractions of Blue Star Junipers is their year-round interest. Their blue-green foliage remains attractive throughout the year, providing color and texture to the garden landscape.

7. Landscape Use: Blue Star Junipers on Standard are versatile plants that can be used in various landscape applications. They make excellent focal points in garden beds, containers, or as specimens in mixed borders.

Overall, the Blue Star Juniper on Standard is a beautiful and unique ornamental plant that adds interest and beauty to any garden landscape. Its compact size, attractive foliage, and year-round interest make it a popular choice among gardeners and landscapers alike.