Column Stock Miracle Yellow Matthiola

Column Stock Miracle Yellow is a single-stem florist type of Matthiola incana with scented yellow flowers, an upright habit, and a listed height of 24–30 inches. PanAmerican Seed describes it as field-grown stock that flowers from late spring through summer and develops best during cool growing periods. ## Flowering and form The exact product page describes dense spikes of large, double flowers closely spaced along the stems. Miracle Yellow is non-selectable for doubleness, so growers do not sort out single-flowered plants as they do with selectable stock lines. The scented blooms are suited to cut-flower use. ## Garden growing Stock is a cool-season plant. North Carolina State Extension recommends full sun and average to humusy, consistently moist, well-drained soil; the species tends to decline when temperatures rise above 80°F. The PanAmerican field-production page also cautions that high heat can stunt plants or prevent flower spikes from developing. Its late-spring and summer classification is a general guide; outdoor timing can vary with local conditions. Sources: [PanAmerican Seed: Column Stock Miracle Yellow](https://www.panamseed.com/Products/074600341007605/matthiola-column-stock-miracle-yellow/); [North Carolina Extension Gardener Plant Toolbox: Matthiola incana](https://plants.ces.ncsu.edu/plants/matthiola-incana/). ## Maintenance Use a sunny, freely draining site and keep moisture even during active growth. Plant for the cooler part of the local season, since heat can reduce stem quality and flowering.