Light Needs
Mature Height
Mature Spread
Growing Zones
The perennial Starstruck Amsonia will bring native pollinators around to your garden beginning in spring. The little rounded plant fills with star-shaped flowers in periwinkle blue that rise above narrow green leaves. This easy-care plant can fill your garden with flowers and the insects that love them when you plant several as a mass planting (and pretty blue color explosion). Amsonia is cold hardy to zone 4 but can tolerate heat all the way up to zone 9, so it is a versatile choice in many growing regions.
Starstruck grows to about 22 inches high and 3 feet around, a great size for placing in the middle of a garden bed as well. The pretty blue flowers keep coming from early spring through early summer. The shrub can grow in full or part sun. Deer avoid amsonia, so that is another reason to add it to your landscape. In fact, add several to form a border around your garden bed, before taller plants.
Starstruck Amsonia Care
Your Starstruck Amsonia is not picky about soil; nearly any soil type will do, including sand and clay. It does prefer a neutral soil pH, but again, not picky at all! Choose a spot that gets partial or full sun, so at least 4 to 6 hours of light a day. Fertilize once in spring with a slow-release fertilizer that is water soluble. That should be all you need to do; Mother Nature will do the rest.
Amsonia likes some humidity and regular water, but does not do well if it sits in soggy soil. Once the plant is established, it can handle periods of drought. Other than watering, the plant needs little care to thrive. You can prune off the faded flowers after it is done blooming in summer.
Starstruck Amsonia Spacing
Space your plants far enough apart to account for their low, spreading habit. In most cases, about 3 feet apart is plenty for this amsonia. For a border effect, inch the plants a little closer together.
Starstruck Amsonia Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 4 to 9 (perennial); grown as an annual elsewhere (outdoors year-round); grown indoors elsewhere (outdoors year-round); grown in containers elsewhere (grown as a seasonal crop)
- Sun Exposure
- Part Sun to Full Sun (5+ Hours Direct Sun)
- Mature Height
- 1 Foot
- Mature Spread
- 3 Feet
- Growth Habit
- , Clumping, Upright
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Blue
- Flower Description
- Blue
- Bloom Time
- Late Spring to Early Summer
- Foliage Color
- , Green
- Foliage Description
- Green
- Foliage Type
- , Herbaceous
- Seasonal Interest
- , Spring Flowering, Summer Flowering
Garden Benefits
Plant Overview
- Common Name
- Starstruck Amsonia
- Botanical Name
- AMSONIA TABERNAEMONTANA 'STARSTRUCK'
Simple Plant Spacing Calculator
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
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Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
If you have any questions about shipping restrictions, feel free to reach out to our team!