Summer Stars Delphinium
Delphinium grandiflorum 'Summer Stars'
Description | Beautify the summer garden with tall spires of beautiful white flowers. Added heat-resistance extends the flowering season into late summer. This perennial’s upright and freely flowering habit is a superb choice for borders and naturalized areas. |
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Light | Full sun |
Watering | Needs regular watering - weekly, or more often in extreme heat. |
Blooms | Summer |
Mature Size | Foliage clumps 14 to 18 in. tall, 12 to 15 in. wide. |
Deciduous/Evergreen | Herbaceous |
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Special Features | Attracts Butterflies, Attracts Hummingbirds, Easy Care |
Growth Rate | Moderate |
Flower Attributes | Flowers for Cutting, Long Bloom Season, Showy Flowers |
Landscape Use | Border, Container |
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Flower Color | White |
Foliage Color | Green |
Companion Plants | Blanket Flower (Gaillardia); Black-Eyed Susan (Rudbeckia); Coneflower (Echinacea); Phlox (Phlox); Shasta Daisy (Chrysanthemum) |
Care | Thrives in rich neutral to alkaline soils; amend soil with lime if needed. Water deeply and regularly during the first growing season to establish an extensive root system. Feed with an all-purpose fertilizer in spring; repeat after first bloom flush. Prune spent blooms to prolong flowering. Cut back to the ground at the end of the season. |
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This Plant's Growing Zones: 3-7

Your USDA Cold Hardiness Zone:
Your climate may be too cold for this plant
Buy Online
This plant is not available to purchase online.
Check a local Monrovia retailer.
Buy Locally
This plant may be available in these stores:
Due to the seasonal nature of plants, availability at your local garden center is not guaranteed. Give them a call before visiting.
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101 Market 8980 Quantrelle Ave. N.e.
Otsego, MN 55330 -
14th Street Garden Center 793 Jersey Ave.
Jersey City, NJ 07303 -
3rd Avenue Floral & Greenhouse 1110 3rd Ave. West
Dickinson, ND 58601
About Us
Monrovia grows beautiful plants for every region
We have been pioneers and craftsmen in the art of growing plants for nearly
100 years. Since our founding in Southern California by Harry E. Rosedale, Sr.
in 1926, we have been absolutely dedicated and obsessed with quality.
We have been pioneers and craftsmen in the art of growing plants for nearly 100 years. Since our founding in Southern California by Harry E. Rosedale, Sr. in 1926, we have been absolutely dedicated and obsessed with quality.