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Download Amsonia Arkansas Blue Star
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Frequently Asked Questions WHAT IS THE GROWTH CYCLE OF THESE LIKE? Arkansas blue star’s delicate, soft willow-like foliage is topped with pale blue star-shaped flowers in spring. After blooming, it quickly grows to reach a height of about 3 feet. The light green foliage looks good all summer, turns a beautiful golden-yellow in fall, and can stand through most of the winter, adding interest especially when mixed with grasses and other attractive seed heads. HOW MUCH DO THESE GET CUT BACK AND WHEN? Plants must be cut back in either the late fall or late winter to about 8 inches from the ground. Remember to wear gloves when working with Amsonia since stems release a white sap. Though not required, cutting them back again half way to the ground after flowering will result in even fuller growth. This should occur in late spring to early summer. MY PLANTS LOOK A LITTLE FLOPPY? Amsonia thrives in most gardens with little care. It is lowmaintenance, 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. WHERE SHOULD THESE BE PLANTED? Amsonia adds a billowy, finely textured element to the landscape. It grows into a dense mass, much like a small shrub. The cool blue flowers can be useful in toning down adjacent flower colors. Arguably the best feature of Amsonia is its fall color; the entire plant turns a stunning shade of golden yellow. It makes an excellent backdrop for fall-blooming perennials such as sedums and garden mums. CAN THESE BE GROWN IN CONTAINERS? Rather than in the garden you may re-pot into large containers. Re pot the plants into at least 15 inch pots separately. First Things First... When your plant arrives from Roberta’s, remove from the shipping box immediately. Remove plastic bag and sleeve from around potted plant(s). Discard any packing material clinging to the leaves or soil. Pull away any yellow or brown leaves that may have occurred during transit. If you can not plant it into garden or larger pot within a few days, make sure it stays well watered. When ready to plant, do the job as early in the day as possible to avoid extreme soil temperatures that prevent proper water uptake from the roots. Water them in well and whisper a few words of wisdom. Amsonia Arkansas Blue Star (Amsonia hubrichtii) quick reference planting guide light/sun exposure: Full Sun to Part Sun usda hardiness zones: 4 to 9 plant type Perennial planting distance: 3 feet mature height/spread: bloom time: 3 feet 3 feet per plant Late Spring - Early Summer by 2nd Season planting instructions: (soil preparation, depth, which end is up, etc.) Remove plastic bag and/or sleeve from around potted plant(s). Transplant into the garden as soon as evening temperatures stay above 40F. Rather than in the garden you may re-pot into large containers. Planting Guide 1 step 2 step Remove plastic bag and/or sleeve from around potted plant(s). Discard any packing material clinging to the leaves or soil. Pull away any yellow or brown leaves or spent flowers that may have occurred during transit. If you cannot plant it into garden or larger pot within a few days, make sure it stays well watered. Transplant into the garden as soon as evening temperatures stay above 40F. Dig holes twice the width of the root ball and about 5 to 6 inches deep. Place them in their holes. Pack soil firmly around roots. Fill with soil and pack in firmly covering entire root zone. Water again. Plants prefer full sun to half day of sun. 3 Rather than in the garden you may re-pot into large containers. Re pot the plants into at least 15 inch pots separately or together inside one larger container. 4 Planted now they will produce flowers in late springearly summer. step step Continuing Care SHELF LIFE Plant into garden or larger pots and place outside immediately after the night temperatures stay above 40 degrees. PLANT PREPARATION Remove plastic bag and sleeve from around potted plant(s). Discard any packing material clinging to the leaves or soil. Pull away any yellow or brown leaves that may have occurred during transit. If you cannot plant it into garden or larger pot within a few days, make sure it stays well watered. SOIL Grow in fertile, moist but well-drained soil. Amend clay type soils with compost or potting mix. GARDEN PREPARATION Amsonia adds a billowy, finely textured element to the landscape. It grows into a dense mass, much like a small shrub. The cool blue flowers can be useful in toning down adjacent flower colors. Arguably the best feature of Amsonia is its fall color; the entire plant turns a stunning shade of golden yellow. It makes an excellent backdrop for fall-blooming perennials such as sedums and garden mums. POTTED PLANTS Rather than in the garden you may re-pot into large containers. Re pot the plants into at least 15 inch pots separately or together inside one larger container. PLANTING SPACING If planting in garden space 3 feet. PLANT HEIGHT AND WIDTH These grow about 3 feet tall and wide. WATER Water upon planting and average watering in summer. FERTILIZER They respond to feeding with a high bloom fertilizer like Flower Magic plant food (M7503). Once a month is sufficient. TEMPERATURE ZONES 4 to 9 When nights stay above 40 degrees, place your plants outside and leave them there. They can withstand winter temperatures to minus 25F. LIGHTING In the summer growing season, full sun is the absolute best. Otherwise a half a day of sun is sufficient. BLOOMING Under correct conditions, blooming begins in late spring to early summer. The 1st year blooming starts a little later. PRUNING Arkansas blue star’s delicate, soft willow-like foliage is topped with pale blue star-shaped flowers in spring. After blooming, it quickly grows to reach a height of about 3 feet. Though not required, cutting them back half way to the ground after flowering will result in even fuller growth. This should occur in late spring to early summer. WINTER DORMANCY Plants must be cut back in either the late fall or late winter to about 8 inches from the ground. Remember to wear gloves when working with Amsonia since stems release a white sap. Additional Reference Shipped As Shown Green foliage in early season Late Spring and Early Summer blooms Soft, willowy yellow foliage in summer Grows 3 feet tall and wide Stunning garden plant Orange foliage in fall 2015