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Plant Information

White Knight® II

Lobularia

General Information GROWING TIPS

Large clusters of beautifully fragrant, white blooms that attract beneficial insects completely envelop this sweet alyssum all season. Since it doesn’t set seed and is very heat tolerant, you can count on seeing blooms from spring all the way until frost. Compared to Snow Princess®, this plant is smaller overall with a more rounded, less trailing shape. It grows well in the landscape, hanging baskets, window boxes and upright containers.  

White Knight® II
Blossom Color White
Bloom Season Planting To Hard Frost
Exposure Part Sun to Sun
Height 4-6 in
Width 24-30 in
Spacing 12-16 in
Container Sizes 104, 104 Spacer, SE52
Hardiness Zones 9, 10, 11
Wildlife Attracted Bees,Butterflies
Wildlife Deterred
Features

Large clusters of beautifully fragrant, white blooms that attract beneficial insects completely envelop this sweet alyssum all season. Since it doesn’t set seed and is very heat tolerant, you can count on seeing blooms from spring all the way until frost. Compared to Snow Princess®, this plant is smaller overall with a more rounded, less trailing shape. It grows well in the landscape, hanging baskets, window boxes and upright containers.  

Adaptable as a Houseplant No
Bog Plant No
Is Disease Resistant No
Drought Tolerant No
Edible No
Erosion Control No
Fragrant Flower Yes
Fragrant Foilage No
Heat Tolerant Yes
Native to North America No
Salt Tolerant No
Succulent No
Water Plant No
Uses

Great in landscapes and containers

Maintenance Notes

No dead-heading necessary for continuous bloom.

White Knight is cold tolerant and heat tolerant. He is also a "heavy drinker" and will prefer evenly moist soil. It will be quick to show drought stress, but should bounce back quickly once re-hydrated. In a hanging basket you should be prepared to water often, maybe more than once a day during warm weather. Plants are easier to keep moist when planted in large planters. Due to water needs White Knight is ideal for use in larger planters. In containers an application of continuous release fertilizer at planting is best. To help maximize performance use applications of a well-balanced water-soluble fertilizer (according to package directions) starting in mid-summer.

White Knight will also perform well in the landscape where she will function as an annual, full sun, groundcover.

While plants shouldn't need to be trimmed back, if the plant is taking over your walkway or is looking less than the best a trim can be administered at anytime. Use a sharp pair of scissors or pruning shears as needed.

A yearly application of fertilizer or compost on garden beds and regular fertilization of plants in pots will help ensure the best possible performance.

The collection of Lobularia from Proven Winners® has quickly gained in popularity since being introduced in recent years. These plants continue to win awards for their unique tolerance to heat and their extended season performance.

2025Top Performer - Oklahoma State University Botanical Gardens
2025Top Performer - University of Florida - Fort Lauderdale
2025Top Performer - University of Wisconsin - West Madison
2025Perfect Score - Boerner Botanical Garden
2025Top Performer - University of Missouri
2025Silver Medal Winner - Champaign County Illiniois Master Gardener Idea Garden
2025Top Performer - University of Minnesota - Grand Rapids
2025Top Performer, Best of Species - Penn State
2025Leader of the Pack - Early Season - North Carolina State, JC Raulston Arboretum
2025Best of Breed - North Carolina State, JC Raulston Arboretum
2025Top Performer - Ohio State University Extension - Springfield
2025Top Performer - Ohio State University - Columbus
2025Perfect Score - Iowa State