Great Coneflower (Maxima)

The Great Coneflower (Maxima) is generally described as a perennial forb/herb. This is native to the U.S. (United States) has its most active growth period in the spring . The Great Coneflower (Maxima) has gray-green foliage and inconspicuous yellow flowers, with a moderate amount of conspicuous black fruits or seeds. The greatest bloom is usually observed in the summer, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Great Coneflower (Maxima) has a short life span relative to most other plant species and a rapid growth rate. At maturity, the typical Great Coneflower (Maxima) will reach up to 9.8 feet high, with a maximum height at 20 years of 0 inches.

The Great Coneflower (Maxima) is not commonly available from nurseries, garden stores and other plant dealers and distributors. It can be propagated by container, seed. It has a moderate ability to spread through seed production and the seedlings have high vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -23°F. has none tolerance to drought and restricted water conditions.

Plant Basics
Category
Growth Rate Rapid
General Type Forb/herb
Growth Period Spring
Growth Duration Perennial
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability No Known Source
Physical Characteristics
Bloom Period Summer
Displays Fall Colors No
Shape/Growth Form Single Stem
Drought Tolerance None
Shade Tolerance Intolerant
Height When Mature 9.8
Vegetative Spread None
Flower Color Yellow
Flower Conspicuousness Yes
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Summer Fall
Seed Spread Rate Moderate
Gardening Characteristics
Propagations (Ways to Grow) Container, Seed
Moisture Requirements High
Cold Stratification Required No
Minimum Temperature -23
Soil Depth for Roots 12
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate Moderate
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 4–7 pH
Precipitation Range 40–40 inches/yr
Planting Density 2728–10912 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 12
Minimum Frost-Free Days 180 day(s)
Salinity Tolerance None
CaCO3 Tolerance Low
Sustainability & Use
Leaf Retention No
Palatability High
Fire Resistant No
Causes Livestock Bloating None

Source: USDA, NRCS, PLANTS Database, plants.usda.gov.
National Plant Data Center, Baton Rouge, LA 70874-4490 USA