Tosca Yellow Matthiola

Tosca Yellow is a greenhouse stock selection grown for cut-flower stems. PanAmerican Seed lists 24–32-inch stems, late-spring, summer, and autumn flowering, and notes that Tosca can perform well in summer under higher light and temperatures. Its crop timing changes with the season. [The exact PanAmerican plant profile](https://www.panamseed.com/Products/074606341006060/matthiola-tosca-yellow/) gives the seasonal transplant-to-finish windows. ## Maintenance Grow it in a greenhouse or protected cut-flower setting with full or partial sun, and plan transplant timing around the intended bloom window. The breeder notes that summer production benefits from higher light and temperatures. Stock generally does best in moist, well-drained soil; cut stems for arrangements and remove spent stems to tidy the planting. Outdoor hardiness and a mature spread are not specified for this selection. [North Carolina Extension](https://plants.ces.ncsu.edu/plants/matthiola-incana/) provides general stock care guidance.