Staircase® Yellow - Lupinus

Staircase® Yellow is the improved yellow-flowered lupine selection identified in the record as LSTYE05-1. Green Fuse lists Yellow among the distinct color choices in its Staircase series, and a perennial grower catalog describes the series at 28–36 inches, hardy in USDA Zones 4–8 and flowering in spring and summer. The bright flower spikes suit a sunny perennial border or cottage-garden planting, where they bring vertical color above the palmate foliage. [Green Fuse](https://green-fuse.com/new/lupine-staircase/) [Gulley Greenhouse catalog](https://www.gulleygreenhouse.com/wp-content/uploads/2024/07/Gulley-Greenhouse-2024-25-Young-Plant-Catalog.pdf) ## Selection Identity The matching code LSTYE05-1 appears as “Staircase Yellow Improved” in [US10721896B2](https://patents.google.com/patent/US10721896B2/en), published July 28, 2020. This identifies the recorded selection and code; it does not imply a conclusion about current patent status. ## Growing Conditions Choose an open, sunny site with soil that drains well. The [RHS growing guide](https://www.rhs.org.uk/plants/lupins/growing-guide) recommends regular water while lupines establish and during hot, dry spells. Established border plants usually need little supplemental water except during severe drought; container plants dry faster and need more frequent checks. ## Maintenance Deadhead faded flower spikes to prolong the display. All parts of lupines are poisonous, so wear gloves when handling them, as the RHS advises.