Giant Goldenrod (Gigantea)

The Giant Goldenrod (Gigantea) 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 summer . The Giant Goldenrod (Gigantea) has green foliage and inconspicuous yellow flowers, with a moderate amount of conspicuous brown fruits or seeds. The greatest bloom is usually observed in the indeterminate, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Giant Goldenrod (Gigantea) has a moderate life span relative to most other plant species and a moderate growth rate. At maturity, the typical Giant Goldenrod (Gigantea) will reach up to 8.2 feet high, with a maximum height at 20 years of 0 inches.

The Giant Goldenrod (Gigantea) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by 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 -33°F. has medium tolerance to drought and restricted water conditions.

Plant Basics
Category
Growth Rate Moderate
General Type Forb/herb
Growth Period Summer
Growth Duration Perennial
Lifespan Moderate
Plant Nativity Native to U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Indeterminate
Displays Fall Colors Yes
Shape/Growth Form Bunch
Drought Tolerance Medium
Shade Tolerance Intermediate
Height When Mature 8.2
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) Seed
Moisture Requirements Medium
Cold Stratification Required No
Minimum Temperature -33
Soil Depth for Roots 16
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate Slow
After-Harvest Resprout Ability No
Responds to Coppicing No
Growth Requirements
pH Range 4–8 pH
Precipitation Range 14–14 inches/yr
Planting Density 0–0 indiv./acre
Soil Textures Fine, Medium
Soil Depth for Roots 16
Minimum Frost-Free Days 110 day(s)
Salinity Tolerance None
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Palatability Medium
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