Growing zones
See Zone Map >Status: In stock
- Sun, Part Sun/Shade
Mature Plant Size (H x W):
18-22" x 32-36" 
Bloom Season:
Spring, Summer
- Attracts Bees
- Deer Resistant
- Native
- Low Maintenance
- Long Blooming
- Stone Mulch
- Attracts Butterflies
- Cut Flower
- Attracts Pollinators
Planting & Care for String Theory Amsonia
Preparation
- Choose a location with full sun to partial shade. While String Theory Amsonia can tolerate some sahde, full sun will promote the best flower production and foliage color.
- A great landscape plant for the perennial border. Great plant used in mass and as edging.
- Mature growth is around 18-22" tall and 32-36" across when mature.
- Well-drained soil in full sun to part shade (afternoon shade preferred).
- Plant in well-draining soil. Amsonia is adaptable to various soil types, including clay, sandy, and loamy soils, but it thrives best in rich, well-drained soil.
- Cut back the stems to the ground in late fall or early spring before new growth begins. This encourages a tidy appearance and healthy new growth.
- String Theory Amsonia is hardy and can withstand cold temperatures. Adding a layer of mulch before winter can help protect the roots from extreme cold.
Planting Containers
- Dig a hole no deeper than the depth of the container and 6" or more, wider on the sides.
- Slide plant from pot by tapping on the bottom of the pot.
- With shovel or knife trim bottom 2" off of the root ball for plants in plastic containers.
- Rotate the plant to the proper position. Never lift or move plants by the tops.
Place the root ball in the hole. - Adjust the plant height so the root crown is slightly higher than the ground.
Place fertilizer packets into the bottom of the hole (if purchased). *Use Our Recommended Fertilizer. - Back-fill the hole with soil, making sure the top of the root ball is visible and slightly higher than the soil around it.
- Firm the soil around the plant. Water well to settle soil around the root ball.
Water frequently when newly planted.
Planting & Handling Help
Download our Planting and Handling Guide below to plan for a successful arrival and install of your plants. Be sure to water all plants as soon as they arrive and every day until you’re ready to plant. Keep any bare root bundles in a shady, cool spot with the roots covered at all times.
Learn More
Watch our videos on handling bare root plants, how your order is prepared for shipment and more.
Plant Sizing
What is the difference between Containers, Grow Bags, Bare Root, and Balled & Burlap (B&B)?
Shipping Times
Our FedEx and local shipping times depend on two factors, one is by the region and the second is the type of product being shipped. For example, small fruits are only shipped in spring, but majority of our perennials are shipped from spring until fall. Keep in mind the dates below act as a general guide. Due to unpredictable weather, staffing, inventory and industry demands these timelines can change. Therefore, we cannot guarantee any of these times.
Shipping Dates by Region*
Northern Cold Region: April 22nd - November 7th
Northern Region: April 15th - November 7th
Middle Region: April 1st - November 7th
Southern Region: March 15th - November 7th
Local Delivery (small radius from Waterloo, WI): April 22nd - November 7th
Shipping Dates by Season*
Spring Shipping: Region Start Date (above) - May
Fall Shipping: September - November
Due to unpredictable weather, these times may vary. Some varieties are exceptions due to heat and plant health reasons. Enter your shipping zip code at the top of this page and be sure to check the shipping information on each product before you add it to your cart. If the product is too large or restricted in your state, you will not be able to checkout with that item in your cart.