String Theory Amsonia

Light Needs

Part Sun to Full Sun

(5+ Hours Direct Sun)

Mature Height

18-22 Inches

Mature Spread

3 Feet

Growing Zones

4 to 9

Boasting a light blue flower atop dark green threadleaf foliage, this late spring to early summer flowering perennial will provide color and soft texture to your garden. In the fall, the foliage will turn from dark green to a brilliant orange. It can grow to a compact height of up to 22” and a spread of up to 36”. This easy to maintain plant will be an excellent addition to any garden.

Native to North America, this perennial is deer resistant and tolerant to moderate heat and humidity. Compact growth habits will create a visual appeal without too much pruning or shaping. Does great in mass planting, border planting and overall landscaping. Providing a splash of color and texture that will complement other flowers and foliage, it does great as a cut flower in floral arrangements. This plant thrives in average soil without much care, nor attention.

String Theory Amsonia Care

Planting in either poor or average quality soil will render the best results within the foliage and flowers, alike. A neutral pH of 7.0 is recommended for the soil for best results. It Is best planted in either partial or full sun. If the soil is too fertile or in too much shade, the compact habit is less likely to continue as the plant loses its shape by becoming droopy. Consistent watering is best for maintaining moist soil, but do be careful not to overwater.

After flowering, cut the stems down to about 6”-8” from the ground to encourage prolific flowering for the next spring. The growth habits of this plant provide you with peace of mind that you will not need to be endlessly dividing the individual plants to create space for new growth. After several years, plant division is recommended to maintain a healthy root system.

String Theory Amsonia Spacing

This is a compact, medium sized perennial that does well planted on its own or as a border plant. Growing up to 36” wide, the plant spacing is recommended to be 32”-36” on center.

Simple Plant Spacing Calculator

Planting Shape

Rectangle Circle Known Area

Length (ft)

Width (ft)

Diameter (ft)

Or enter radius below

Radius (ft)

Known Area (sq ft)

Plant Spacing On-Center (in)

Pattern

Square (grid) Triangular (staggered)

Fill edge gaps (max plants)

Enter area to see results.

Visual Preview

Print / Save PDF

Powered by