Mammoth Sunflower

Mammoth Sunflower Care

Helianthus giganteus

What is the plant

Helianthus giganteus, is a species of Helianthus native to the eastern United States and eastern and central Canada. Helianthus giganteus is a perennial herbaceous plant growing up to 4 m tall. The leaves are slender, lanceolate.

Helianthus giganteus is a perennial herbaceous plant growing up to 4 m (over 13 feet) tall. The leaves are slender, lanceolate. The flower heads are bright yellow, up to 7 cm (2.8 inches) in diameter. They are most commonly found in valleys with wet meadows or swamps. Giant Sunflower grows from a fleshy root system that develops small rhizomes which allow the plant to spread vegetatively. It prefers full sun, and moist conditions. The genus Helianthus is from two Greek words, helios for 'sun' and anthos for 'flower'. The species giganteus refers to the tall height of the plant. The author name for the plant classification, 'L.' is for Carl Linnaeus (1707-1778), Swedish botanist and the developer of the binomial nomenclature of modern taxonomy. It has invasive tendencies.

If you’ve recognized any mistakes feel free to notify us about it. This would help us to provide only the best-quality information.

Lighting

Full Sun

Hardiness zone

min 4a

Difficulty

Easy

How to Care for the Plant

Water
It's best if the soil that your dwarf fig tree sits in is moist at all times. however, it's essential not to overwater, as this can cause root rot, and end up killing your tree. when the soil is saturated with water, the roots will not absorb any of it, and just end up going rotten.
Pruning
Use sharp pruning shears to remove the sucker branches and the errant branches that are growing in the wrong direction or making it difficult to fertilize the tree. Since lemon cypress has a conical habit, trim the tree as per its natural shape. Trimming should be done every week during the summer.
Fertilizer
Fertilize just once a year, in early spring, using a balanced fertilizer with a 10-10-10 formula.

Disease diagnosis

Check your plant’s health

Ease your plant care routine with PlantIn's personalized system.

Sunlight
This plant needs a lot of sunlight, but it has to be protected from the strongest rays of the sun.
Soil
The ideal blend of soil for plant growth is called loam. Often referred to as topsoil or black dirt by landscape companies, loam is a mixture of sand, clay, and silt.
Temperature
It can be grown in the areas with the lowest winter temperatures of −34.4°C (−30°F).

Ease your plant care routine with PlantIn's personalized system.

Container
Whether it be plastic or clay, make sure the pot you select has drainage holes in the bottom to prevent over-watering.
Popularity
1,368 people already have this plant 307 people have added this plant to their wishlists