Height:

24.0-30.0 Inches

Spread:

38.0-42.0 Inches

Hardiness Zones:

4,5,6,7,8,9

Flower Color:

Blue shades

Foliage Color:

Green shades

Sunlight:

Full Sun (> 6 hrs. Direct Sun) Part Shade (4-6 hrs. Direct Sun)

Water Requirements:

Average Water Needs Consistent Water Needs

Soil Quality:

Poor Soil Quality Average Soil Quality Fertile Soil Quality

Soil Chemistry:

Neutral Soil (pH = 7.0)

Bloomtime:

Late Spring Early Summer

Critter Resistant:

Deer Resistant

Growth Rate:

Medium

Garden Style:

Eclectic Rain Garden Water Garden

Other Features:

Border Plant Cut Flower Cut Foliage Easy To Grow Mass Planting Focal Point

Origin:

Native to North America

Amsonia thrives in most gardens with little care.  It is low-maintenance, easy to grow and trouble-free.  Plant it in full sun or partial shade and moist soil of average fertility.  If grown in too much shade or very rich soil, its habit will be open and floppy.  This plant grows fairly large but it will not need to be divided for many years.  Cutting the stems back to within 6-8" of the ground after flowering will result in fuller growth.

Growing Temperature:

55-65° F

Holding Temperature:

40-50° F

Soil PH:

5.6-6.2

EC (What is EC?):

2.0-3.0 pour through method

Fertility:

After new leaves emerge use a water-soluble fertilizer, solutions of 50-100 ppm at each or every other watering. May benefit from additional iron applications.

For Controlled Release or Slow Release Fertilizer, see your preferred supplier for recommended rates for incorporation or top dressing, as it varies by fertilizer.

Vernalization:

10-12 weeks at temperatures below 40° F.

Pests & Diseases:

Leaf spot (Mycosphaerella), rusts.

Potting & Timing:

Small plugs should be potted in late spring to early summer. These plants will be ready for sales the following spring.
Place the crown about one half inch below the soil surface as this helps promote better eye development for the following season.
Bare root should be planted so the crown is slightly below the soil surface.

Moisture:

For potting soil use commercial planting media.
Allow plants to dry thoroughly between waterings.

Planting Level:

Crown just below soil surface.

PGRs/Pinching:

Sumagic (Uniconazole) can be applied as a drench at 1 ppm or spray at 5 ppm.

Awards

Michigan State University Top Performer -- 2022

Mississippi State University Ornamental Trial Top Performer -- 2021

Proven Winners National Landscape Perennial of the Year -- 2024

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