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Helianthus agrestis are an annual species that flower in the late summer to early fall months. [5] Helianthus species require a lot of sun to grow. For optimal growth, the plant should get at least 6 hours of full sun a day. [1] Sunflower seeds also contain a toxic substance that will kill all nearby grass. [8]
Sunflowers grow best in fertile, moist, well-drained soil with heavy mulch. They often appear on dry open areas and foothills. [4] Outside of cultivation, the common sunflower is found on moist clay-based soils in areas with climates similar to Texas. In contrast, the related Helianthus debilis and Helianthus petiolaris are found on drier ...
Helianthus annuus 'Russian Giant' can grow in a neutral to alkaline, well-drained moisture, rich in humus, and moderately fertile soil exposed to full sun. A cane might be needed to support the weight of the bloom.
It's said to grow all new grass (including seeds, sod, and plugs) 70% thicker and 35% quicker versus unfed grass. The nutrients makeup helps establish roots and healthy blades, plus it works ...
Helianthus (/ ˌ h iː l i ˈ æ n θ ə s /) [3] is a genus comprising around 70 species of annual and perennial flowering plants in the daisy family Asteraceae commonly known as sunflowers. [ 4 ] [ 5 ] Except for three South American species, the species of Helianthus are native to North America and Central America .
Helianthus tuberosus is a herbaceous perennial plant growing to 1.5–3 m (4 ft 11 in – 9 ft 10 in) tall with opposite leaves on the lower part of the stem but alternate towards the top. [7] The leaves have a rough, hairy texture. Larger leaves on the lower stem are broad ovoid-acute and can be up to 30 cm (12 in) long. Leaves higher on the ...
Helianthus grosseserratus, commonly known as sawtooth sunflower or thick-tooth sunflower, [3] is a perennial sunflower in the family Asteraceae, ...
Helianthus pauciflorus, called the stiff sunflower, is a North American plant species in the family Asteraceae. It is widespread across the Great Plains , the Rocky Mountains , and the Great Lakes region , and naturalized in scattered locations in the eastern United States and in much of southern Canada (from Alberta to Nova Scotia ).
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