Summer White, also known as Arenaria Montana or Sandwort, is a perennial flower native to southwest Europe. Syngenta developed this cultivar as a vigorous, long-blooming variety with no need for cold treatment. It offers an upright mounded habit of 10-12" tall and 4-6" wide with white flowers from spring through summer. Perennial in zone 7-9, Sandwort flourishes in full or partial sun with moderate water, bringing whimsy to patio containers, cottage and rock gardens, and landscape borders. For a compact variety, try Winter White.
Summer White Selling Tips
Sell Summer White to customers looking for a low-maintenance perennial to add to a container or cottage garden. This plant offers many benefits, including a long bloom season and mounded habit well-suited to containers and borders. Attract pollinators to the landscape with white flowers. Create a whimsical cottage garden or landscape border by pairing Arenaria with Dianthus, Phlox, Veronica, Geranium, Rock Cress, Leucanthemum, and Heuchera.
Coach Your Customer
1. Space plants 4-6" apart in well-drained soil in full or partial sun.
2. Water regularly as the plant establishes roots in the first year. Allow soil to dry between waterings.
General Growing Tips For Your Rooted Cutting Liner
For best results with Summer White, plant one rooted liner per 4-inch container or two per gallon container. Use a well-drained soil with a pH of 5.8-6.2, EC of SME 1.5-2.1 or PourThru 2.3-3.2, temperatures of 66-68 daytime and 56-58 nighttime, and light feed (75-125 ppm N). Use a Bonzi drench if needed. This plant doesn't require vernalization but needs long days (14 hours of 4,000-6,000 fc). You may see aphids. This plant can be prone to root rot, Botrytis, and powdery mildew in wet conditions.
Flowering
White flowers bloom from spring through summer.
Pinching
Pinch once.
Spacing
Space containers for adequate airflow around the base of each plant and to allow sunlight to penetrate to the soil level.
Height Control
This plant doesn't typically require PGRs. Use a Bonzi drench of 10-20 ppm if needed.
Pests
You may see aphids.
Disease
Summer White is prone to rust and should be sprayed preventatively. In overly wet conditions, root rot, botrytis, and powdery mildew can infect Arenaria. Prevent these conditions by taking some simple precautions.
1. Water at the base of each plant in the morning and allow the soil to dry between waterings.
2. Space containers for airflow around each plant and to allow sunlight to penetrate to the soil level.
3. Provide adequate airflow in your greenhouse. We recommend using horizontal airflow fans.
Planting Summer White Liners
We recommend planting one rooted liner per 4-inch container or two per 6-inch or gallon container. Use a well-drained soil and completely bury the ellepot in the center of the container or evenly space the ellepots in gallon containers.
Rooted Cuttings
Cuttings vary in size between different plant families. These rooted starter plants will arrive ready to be transplanted in to your final container. If they are to be used in a landscape application, you will need to establish them in a 4 inch pot or an 1801 before planting outside.
Arenaria Summer White Quick Reference Guide
| 4 Inch crop time | 5-6 Weeks |
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| 10 Inch crop time | 6-7 Weeks |
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| Bloom Period | Spring, Summer |
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| Color | White |
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| Habit | Mounding, Upright |
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| Height | 10-12 inches |
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| Light | Full Sun, Partial Sun |
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| Minimum Temp | 56 |
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| Perennial Zone | Zones 7-9 |
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| Water Needs | Light |
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| Patented Plant | yes |
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