Opera Debora Matthiola

Opera Debora is a greenhouse-grown Matthiola incana stock selection intended for scheduled flower production. PanAmerican Seed lists upright growth, a 32-inch plant height and stem length, and spring-flowering Group 2 timing; its schedule is for controlled greenhouse crops, not an outdoor all-season guarantee. ## Flowering and cut stems The exact [PanAmerican Seed Opera Debora profile](https://www.panamseed.com/Products/074602191001464/matthiola-opera-debora/) recommends this selection for greenhouse production and lists flowering in early spring, spring, late spring, autumn, and winter. The breeder says selectable matthiola typically produce about 50% double-flowering plants, with young plants suitable for selecting single-flowered forms. This selection suits planned cut-flower production where crop timing and flower form matter. ## Greenhouse timing Plug production takes five to six weeks. PanAmerican lists transplant-to-finish periods of 11–12 weeks in winter, 8–9 weeks in spring, 6–8 weeks in summer, and 4–7 weeks in autumn. It recommends autumn through late-spring flowering; year-round production is possible when summer greenhouse temperatures remain cool. These are crop-planning intervals, not a garden bloom calendar. ## Maintenance Provide a sunny greenhouse position and schedule the crop for its intended flowering window. The listed six plants per square foot is greenhouse planting-density guidance, not a mature landscape width. Select young plants if single-flowered forms are preferred, then clear finished plants as the production cycle ends.