Asclepias linaria 'Monarch Magnet'
Light: Full sun in cooler climates; in Phoenix, provide morning sun and afternoon shade, avoiding reflected heat.
Water: Moderate water; irrigate deeply when the upper few inches of soil dry. Provide regular irrigation during Phoenix summers without keeping roots constantly wet.
Soil: Well-drained sandy loam or loam. Tolerates varied soils, but avoid waterlogged sites and poorly drained, compacted clay.
Mature size: Typically 3–5 feet tall and 1–3 feet wide initially; underground rhizomes can eventually form a much wider colony.
Bloom: Typically late spring through summer; flowering may diminish during extreme Phoenix heat. Seed-grown plants may take two or more years to flower.
Evergreen / deciduous: Deciduous herbaceous perennial; stems die back during dormancy and regrow from the roots.
Growth rate: Moderate to fast once established, though extreme desert heat may slow growth.