Appearance: Leaves can be heart-shaped, lance-shaped, or nearly round, with textures ranging from smooth and glossy to deeply corrugated or "seersucker".
Color Palette: They span a wide range of shades, including emerald, apple green, olive, and chartreuse.
Flowers: In mid-to-late summer, they produce tall scapes (flower stalks) with bell-shaped blooms in lavender, white, or pale purple. Some green species, like Hosta plantaginea, are famous for their large, highly fragrant white flowers. 
Light: While they thrive in dappled shade, green hostas often tolerate slightly more light than blue varieties. Dark green types prefer moderate shade to maintain their rich color, while chartreuse or lime-green types often need a few hours of morning sun to stay vibrant.
Watering: They need about one inch of water per week. Hostas under large trees may need extra water as they compete with tree roots for moisture.
Soil: Use rich, well-draining soil high in organic matter (pH 6.5–7.5).
Maintenance:
Mulching: Apply 2–3 inches of organic mulch to retain moisture.
Pests: Slugs, snails, and deer are the main threats. Varieties with thicker, "leathery" leaves are more resistant to slug damage.
Division: They can be divided every 3–5 years in early spring or fall if they become overcrowded. 
Popular Green Cultivars
Royal Standard: A classic medium-sized hosta with glossy green leaves and fragrant white flowers; very sun-tolerant.
Sum and Substance: A giant variety with massive, thick chartreuse-green leaves that are highly slug-resistant.
Empress Wu: One of the largest hostas in the world, featuring enormous, deeply veined dark green leaves.