Alstroemeria is a fleshy-rooted, clumping perennial with upright growth. New shoots emerge as soil warms in spring, followed by a long flowering season extending from late spring through summer and often into autumn. Flowers may be white, yellow, orange, pink, red, purple, or bi-coloured. Top growth dies back in winter while the fleshy roots persist. Modern cultivated selections provide a showy display, and the plant is considered deer resistant.

Where it grows best

Choose full sun or partial shade; light shade is tolerated, while afternoon shade can be useful in hot conditions. Plant in fertile, organically rich soil that drains freely to sharply. Loam and most soil types are suitable when they are free draining. Avoid waterlogged, soggy, damp, or poorly drained sites, including heavy clay without improvement. Alstroemeria is listed for hardiness zones 7–10 and is frost sensitive. In colder Canadian areas, grow it as a container plant or provide suitable winter protection rather than assuming it will survive exposed winter conditions.

Garden and wildlife value

Use Alstroemeria as a border perennial, container plant, cut flower, or mass planting in a sunny, well-drained site. Its long flowering season and range of flower colours make it useful for sustained ornamental interest. It generally tolerates light shade and offers deer resistance. No stronger wildlife or pollinator value is established in the approved information.

Everyday care

During active growth, water deeply when the top 2–5 cm of soil is dry, aiming for roughly 20–25 mm per week in the root zone. Let the surface dry slightly between waterings, but maintain regular moisture for best flowering. Established plants can tolerate brief dry spells, while small or exposed containers may dry more quickly. Ensure containers have effective drainage. Remove spent flower stems by pulling or cutting them at the base to encourage further blooms.

What to do through the season

Shoots emerge in spring as the soil warms. During the flowering season, water as needed and remove spent stems. After the first hard frost, cut dead foliage close to ground level and remove debris. In colder climates near the lower hardiness limit, apply loose winter mulch after the soil has cooled and avoid disturbing the crowns until spring growth resumes. The approved information does not provide a reliable month-by-month bloom schedule.

Problems and symptoms

Frost can damage this sensitive perennial, especially in cold or exposed sites. Damp or waterlogged soil can cause root rot, while warm, humid, stagnant conditions carry elevated fungal risk. Small or exposed containers have a moderate to high risk of drying. Division can damage the plant because its roots are fragile.

Corrective and preventive care

Prioritize free drainage and avoid soggy soil. Water deeply but only after the surface has dried slightly, and do not leave containers standing in water. Improve site conditions before planting where drainage is poor. Remove spent stems and clear dead foliage and debris after frost to reduce overwintering pests and fungal spores. Divide carefully only when needed, using the approved division method; seed is also supported as a propagation option.

Before you plant

Confirm that the site is in hardiness zone 7–10 or plan to grow the plant in a container or provide winter protection. Select a sunny to partly shaded location with moderate moisture and excellent drainage. Make sure the planting area will not remain damp after rain. Allow for a clumping, upright habit, but no reliable genus-wide mature height or width range is available in the approved information.