Helianthus

“Helianthus are a large genus of plants that can be grown as Hardy perennials or Hardy annuals.” — Helianthus Plant Growing & Care Guide for Gardeners

“usually lasting anywhere from 90 up to 150 days” — (Helianthus annuus) Sunflower Care Guide

“Sunflowers love full sun and a well-draining soil.” — Helianthus Plant Growing & Care Guide for Gardeners

“young plants will benefit from regular watering.” — Helianthus Plant Growing & Care Guide for Gardeners

“leave 2 to 3 feet of space around divisions to give them room to spread.” — 10 Types of Perennial Sunflowers to Grow Year After Year

“Height 1.5–2.5 metres” — Helianthus / RHS Plant Guide

“Seed Success: Start Strong with this Ultimate Seed Starter Kit” — Helianthus Plant Growing & Care Guide for Gardeners

“If you want to use your sunflower seeds for culinary use, then they will need to be protected from birds” — Helianthus Plant Growing & Care Guide for Gardeners

“and sunflower seeds are of great commercial and health value.” — Helianthus Plant Growing & Care Guide for Gardeners

“such as aphids and caterpillars.” — Helianthus Plant Growing & Care Guide for Gardeners