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Inula helenium
( Elempane )

Inula comprises a group of medium to large clump forming perrenials, with large daisy-like yellow flowers with many narrow ray flowers around a central disk. They prefer full sun, well drained soil and are cold hardy. Moisture needs vary depending upon species. Propagate by seed, or by dividing in spring or fall. I. helenium, a rhizomatous perennial has thick stems of egg-shaped leaves to 32 inches long, and wavy edges. Flowerheads in bright yellow are produced in single corymbs summer through fall.


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Characteristics
Cultivar:n/a  
Family:Asteraceae  
Size:Height: 3 ft. to 6 ft.
Width: 2 ft. to 3 ft.  
Plant Category:perennials,  
Plant Characteristics:spreading,  
Foliage Characteristics:coarse leaves,  
Foliage Color:green,  
Flower Characteristics:long lasting,  
Flower Color:yellows,  
Tolerances:slope, wind,  
Requirements
Bloomtime Range:Mid Summer to Late Summer  
USDA Hardiness Zone:4 to 8  
AHS Heat Zone:Not defined for this plant  
Light Range:Sun to Full Sun  
pH Range:5.5 to 8  
Soil Range:Some Sand to Some Clay  
Water Range:Normal to Moist  

Plant Care



Fertilizing
How-to : Fertilization for Annuals and Perennials

Annuals and perennials may be fertilized using: 1.water-soluble, quick release fertilizers; 2. temperature controlled slow-release fertilizers; or 3. organic fertilizers such as fish emulsion. Water soluble fertilizers are generally used every two weeks during the growing season or per label instructions. Controlled, slow-release fertilizers are worked into the soil ususally only once during the growing season or per label directions. For organic fertilizers such as fish emulsion, follow label directions as they may vary per product.

Light
Conditions : Full Sun

Full Sun is defined as exposure to more than 6 hours of continuous, direct sun per day.

Watering
Conditions : Regular Moisture for Outdoor Plants

Water when normal rainfall does not provide the preferred 1 inch of moisture most plants prefer. Average water is needed during the growing season, but take care not to overwater. The first two years after a plant is installed, regular watering is important. The first year is critical. It is better to water once a week and water deeply, than to water frequently for a few minutes.

Planting
How-to : Preparing Garden Beds

Use a soil testing kit to determine the acidity or alkalinity of the soil before beginning any garden bed preparation. This will help you determine which plants are best suited for your site. Check soil drainage and correct drainage where standing water remains. Clear weeds and debris from planting areas and continue to remove weeds as soon as they come up.

A week to 10 days before planting, add 2 to 4 inches of aged manure or compost and work into the planting site to improve fertility and increase water retention and drainage. If soil composition is weak, a layer of topsoil should be considered as well. No matter if your soil is sand or clay, it can be improved by adding the same thing: organic matter. The more, the better; work deep into the soil. Prepare beds to an 18 inch deep for perennials. This will seem like a tremendous amount of work now, but will greatly pay off later. Besides, this is not something that is easily done later, once plants have been established.

Problems
Miscellaneous
Glossary : Border Plant

A border plant is one which looks especially nice when used next to other plants in a border. Borders are different from hedges in that they are not clipped. Borders are loose and billowy, often dotted with deciduous flowering shrubs. For best effect, mass smaller plants in groups of 3, 5, 7, or 9. Larger plants may stand alone, or if room permits, group several layers of plants for a dramatic impact. Borders are nice because they define property lines and can screen out bad views and offer seasonal color. Many gardeners use the border to add year round color and interest to the garden.

Glossary : Herbaceous

Herbaceous refers to a non-woody plant that dies back at the end of its growing season, generally after frost or during the fall of the year. The rootstock of perennials will overwinter, providing the plant is hardy in that area, and resume growth in the spring.

Glossary : Perennial

Perennial: traditionally a non-woody plant that lives for two or more growing seasons.

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