How to Grow Glassy Onion

Overview

The glassy onion or allium hyalinum is a perennial that is native to the United States, most commonly found in California. It is available through plant dealers, nurseries and garden stores. The glassy onion grows about 20 inches high and develops white or pink flowers in the summer. As the flowers age, they become transparent.

Bulbs

Step 1

Purchase or seed glassy onion bulbs. The ideal time to plant them is in autumn.

Step 2

Use a small shovel to dig holes that are 1 to 3 inches deep. Make sure the location is in full sun to partial shade.

Step 3

Place the bulbs in the holes. For the most desirable results, plant in groupings. Cover the bulbs with soil.

Step 4

Make sure the soil is well-drained or opt for planting glassy onion in a raised bed.

Step 5

Water the bulbs immediately after you plant them. As the plants grow, weed around them to keep them healthy.

Seeds

Step 1

Plant the seeds in pots in the autumn. Sprinkle them on top of soil that is well-drained.

Step 2

Cover the seeds with a thin layer of dirt. Add a quarter-inch of gravel on top of the soil, to keep the moisture in. Keep the pots in partial shade.

Step 3

Add water to the pots and make sure to keep them slightly moist at all times. Once the leaves shrivel in the early summer, stop watering them.

Step 4

Move the seeds to a garden in the summer or fall.

Step 5

Plant them in holes that are at least 1 inch deep and cover with soil. Water.

Tips and Warnings

  • Glassy onion can be invasive.

Things You'll Need

  • Bulbs or seeds
  • Pots
  • Shovel
  • Soil
  • Water

References

  • Gardening.eu
  • Calflora.org
  • Robs Plants
Keywords: Glassy onion, perennial, plant glassy onion

About this Author

Based in New York State, Kelly Shetsky started writing in 1999. She is a broadcast journalist-turned Director of Marketing and Public Relations and has experience researching, writing, producing and reporting. She writes for several websites, specializing in gardening, medical, health and fitness, entertainment and travel. Shetsky has a Bachelor of Arts in communications from Marist College.