White Vienna Kohlrabi Seeds

Sowing: Kohlrabi thrives in cooler temperatures but can be grown continuously from spring to fall in most regions. Begin by direct sowing the seeds in well-drained, nutrient-rich soil under full sun, ideally about 2-3 months before the last spring frost, or when the soil temperature averages at least 10 degrees Celsius. Plant the White Vienna kohlrabi seeds approximately 6 millimeters deep, spacing them at intervals of ten seeds per 30 centimeters. Once the seedlings emerge, thin them to maintain a spacing of 12-13 centimeters apart in rows spaced 30 centimeters apart. To ensure a continuous harvest, sow new seeds every few weeks until about six weeks prior to the first autumn frost. Gardeners in regions with milder winters can sow seeds in late winter for an early spring crop. For optimal growth, consider companion planting kohlrabi with onions, beets, or cucumbers, while avoiding planting it alongside strawberries or tomatoes.

Growing: Kohlrabi flourishes with consistent moisture and well-prepared soil. The best flavor and tenderness are achieved when the kohlrabi plants experience rapid growth. Maintain soil moisture and suppress weeds by applying a layer of mulch. Keep an eye out for common pests such as aphids and maggots, which can cause damage to the crop if left unattended.

Harvesting: For optimal tenderness, gather kohlrabi when they reach a diameter of 5-7.5 centimeters. Pull up the entire plant and trim off the leaves and roots. Kohlrabi can be stored in the refrigerator for up to a month, maintaining their freshness.

Seed Saving: To maintain genetic purity, it's essential to isolate kohlrabi from other cabbage family members like broccoli or cauliflower. Towards late fall, dig up the chosen plants intended for seed saving. Trim off the leaves and stem, leaving the root around 10-15 centimeters long. Place these plants in moist sand, ensuring a temperature of approximately 4 degrees Celsius. About 4-6 weeks before the last spring frost, replant the selected plants. As the plants mature, they will develop stems reaching 120-150 centimeters in height, adorned with numerous yellow, four-petaled flowers. Allow these flowers to mature, and once seed pods form, harvest them. Let the pods dry before extracting the White Vienna kohlrabi seeds. Store the seeds in a dry, cool location for up to five years.

Planting Methods: Direct sow the seeds in well-drained, nutrient-rich soil under full sun or partial shade, spacing them approximately 6 millimeters apart and covering them with a thin layer of soil. Keep the soil consistently moist until germination, which usually occurs within 7-14 days. Once the seedlings emerge, thin them to maintain a spacing of 12-13 centimeters apart to allow for proper growth.
Blooming Season: Kohlrabi plants typically bloom during the cooler seasons of spring and autumn.
Planting Season: Plant White Vienna Kohlrabi seeds about 2-3 months before the last spring frost or when the soil temperature reaches at least 10 degrees Celsius. Additionally, seeds can be sown in late winter for an early spring crop in regions with mild winters.
Latin Name/USDA Zones: Brassica oleracea var. gongylodes. Suitable for USDA Zones 3-10.
Sunlight Required/Height: Requires full sun to partial shade. Kohlrabi plants typically reach a height of 30-40 centimeters.
Shelf Life After Test Date: Shelf life can vary, but properly stored kohlrabi seeds can remain viable for up to 3-5 years after the test date.
Seed Type: Kohlrabi seeds are classified as vegetable seeds.
Soil Type: White Vienna Kohlrabi thrives in well-drained loam soil, but can also tolerate clay or sandy soil types.