It seems like there might be a typo or a less common name in your query. If you’re referring to a specific plant with a name similar to "Asto," I’m not familiar with it. However, if you meant something like Astro or Astilbe (a genus of flowering plants), I can provide information on those.

Here’s a brief overview of Astilbe plants, which are often just called “Astilbe”:

• Appearance: Astilbes are known for their attractive, feathery flower spikes that come in various colors including pink, red, white, and purple. They have fern-like foliage that adds texture to garden beds.
• Habitat: They are shade-loving perennials that thrive in moist, well-drained soil. They are native to woodland areas in Asia and North America.
• Uses: Astilbes are commonly used in shaded garden beds and borders due to their ability to brighten up low-light areas. They are also valued for their long-lasting flowers and attractive foliage.

If this isn't what you were looking for, please provide more details or clarify the name, and I’ll do my best to assist you!