Tosca Blue Sea Matthiola

Matthiola Tosca Blue Sea is a greenhouse stock selection grown for cut stems and scheduled seasonal flowering. PanAmerican Seed lists a 24–32-inch height and stems of the same length, with late spring, summer, and autumn bloom. ## Characteristics The developer describes Tosca as a greenhouse crop with selectable stock and gives seasonal production schedules. Its profile lists partial sun or sun, a five-to-six-week plug stage, and transplant-to-finish timing of eight to ten weeks in autumn, ten to eleven in spring, six to eight in summer, and twelve to fourteen in winter. The Blue Sea selection is distinct from the other Tosca colors. ## Growing Follow the grower’s schedule for the target crop season. PanAmerican Seed notes that Tosca can be grown in summer with higher light levels and temperatures; its production guide is for greenhouse cultivation rather than a universal outdoor flowering calendar. See the [PanAmerican Seed Tosca Blue Sea profile](https://www.panamseed.com/Products/074606341000717/matthiola-tosca-blue-sea/) for the specific size and crop-timing details. ## Maintenance Harvest stems at the desired stage and remove spent stems after cutting. Plan greenhouse sowing and transplanting around the listed crop windows; the source gives no garden spacing or USDA hardiness range.