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Planting Instructions for Helianthus (perennial sunflower):

Bloom Time:  Late summer and fall Light:  Full sun to part sun
Soil:  Average to rich, well-drained Moisture:  Average
Planting Depth:  Horizontally, about 1 to 2" below soil Spacing:  36"

Upon arrival:  Unpack box and check that you have everything on your packing list. If condensation has formed on the inside of the bag, open and let it air out then keep the roots on the dry side. Plant everything within a few days.

Soil/Location:  Plant your Helianthus in full sun to part sun in average to rich, well-draining soil. Avoid areas that may collect water or stay wet for too long.

Moisture:  Helianthus is very adaptable to any good soil and is also quite drought tolerant. It likes occasional moisture so long as the soil dries out between watering. Black spot or wilting that occurs while the soil is moist may be signs of fungus problems. If this happens let them dry out completely and dust or spray with a fungicide.

Spacing:  Give them plenty of room as they will spread to form a colony. Space 36" apart or more.

Depth:  The roots spread horizontally under the ground and should be planted about 1 to 2" below soil level. Mulch lightly after planting.

General Instructions:  Amend your garden with compost or peat humus to enrich or loosen the soil, if needed, however Helianthus is very adaptable to any loose, well-draining soil. Mix a couple teaspoons of garden food or bone meal into the planting hole if desired. After planting you can water in once and then they shouldn't need to be watered again until after they are sprouted and actively growing, and even then they should always dry out between watering.

In time perennial sunflowers can grow very thick and dense which could cause them to grow shorter and bloom less. If this occurs you can rejuvenate the clump by lifting the roots, thinning them out, and replanting in freshly amended soil.

Landscape Uses:  The tall, dark green foliage of perennial sunflowers make excellent backdrops to summer blooming plants such as hardy geranium, baby's breath, Liatris, Echinacea, garden phlox, lilies and daylilies. The bright yellow flowers make a nice combination with purple ironweed (Vernonia), Hibiscus, Buddleia, and Caryopteris plus they look great with ornamental grasses.

 
 
Hallson Gardens
PO Box 220
Brooklyn, MI 49230
517-592-9450

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