Katz Yellow Matthiola

Katz Yellow is a yellow-flowered Matthiola incana selection with an upright habit and a listed height of 32 inches. PanAmerican Seed identifies spring and autumn flowering and recommends sun exposure. ## Flowering and form The exact developer page describes the Katz line as producing approximately half double-flowered stems, with uniform stem length and timing and more heat tolerance than traditional field types. It is intended for high-tunnel or field production, and growers in some climates can schedule crops over a longer period. These production details do not guarantee year-round outdoor bloom. ## Garden growing Matthiola incana 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 Katz line’s improved heat tolerance is relative to European or traditional field types, so warm local conditions still affect garden performance. Sources: [PanAmerican Seed: Katz Yellow](https://www.panamseed.com/Products/074605412006060/matthiola-katz-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 soil evenly moist while the plant is growing. In hot climates, schedule this cool-season selection for milder weather and expect flowering to decline as heat arrives.