Water Needs. This does take up a lot more space in your garden than the standard kohlrabi that’s 2–3 inches in diameter. You can measure the amount of water with a rain gauge. Fall-harvested kohlrabi can grow a … Apply 1 to 1.5 inches of water per week if it doesn’t rain. To help your kohlrabi grow healthy and strong, water them frequently so the soil is always moist. Kohlrabi needs an even supply of moisture to produce good bulbs. Learn how to grow kohlrabi, a great addition to any fall vegetable garden. For a spring crop plant the seeds outside after danger of a hard frost: sow in midsummer for a fall crop, or in fall for a winter crop. Kohlrabi will grow best in moist, fertile, well-draining soil with a slightly acidic pH between between 6.0 and 6.8 and at temperatures between 7 and 24°C (45–75°F). Spraying bacillus thuringiensis can help to control cabbage worms. Kohlrabi prefers rich, well-drained soil in full sun. Kohlrabi is a sweet, cabbage like vegetable that thrives in cooler temperatures and is also quick to mature. The lesions may encircle the stems and cause wilt. Placing collars around the stem can give aid in protecting seedlings form cutworm damages. Aim to give your plants 1 … Turnip, Rutabaga, Kohlrabi Growing Problems: Troubleshooting • Seeds rot or seedlings collapse with dark water-soaked stems as soon as they appear. Insect is common, white, root feeding maggot. Excess moisture should be monitored, as … If you transplant, there’s a higher chance that the roots get damaged or the plant gets stressed and growth is stunted. Scientific name Brassica oleracea var. Turnips are prone to all the usual problems associated with growing Brassicas, including anthracnose, clubroot, leaf spot, scab, turnip mosaic virus, Rhizoctonia rot, root-knot, and white rust. Growing Conditions for Kohlrabi. I have not yet tried this giant kohlrabi, but it’s on my list for future plantings. Drying out is a more serious problem when growing kohlrabi, because the plants sit atop the ground and do a terrible job of shading surrounding soil. Cutworms, cabbage loopers, aphids, and imported cabbage worms can cause damage to the Kohlrabi plants. If the bulb gets too large, it will become tough, woody and bitter. Damping off is a fungus that... • Young plants are eaten or cut off near soil level. Keep the soil constantly moist and weed free, watering before the onset of drought. The most common problem is aphids, which are easily taken care of with a powerful stream of water. Make small plantings every 2 to 3 weeks for continuous spring and early summer harvest. Choose a pot at least 300mm wide and deep and position in a sunny spot. Kohlrabi bulbs should be harvested at about 3″ in diameter, or about the size of a tennis ball. Privacy Policy, Cauliflower Growing Problems: Troubleshooting ». When and How to Harvest. Fill with quality potting mix, such as Yates Potting Mix with Dynamic Lifter. Apart from time and the right temperature, several other factors are essential to let the garden's kohlrabi sprout. Kohlrabi can be grown in almost any region or planting zone, from Maine to Georgia and from Oregon to Texas, as long as it is planned for the shoulder seasons (i.e. To learn how to treat pests on kohlrabi… It is easy to deter these beetles by covering kohlrabi plants with a thin row cover. Like most brassica, Chinese kale is susceptible to common garden pests, but with careful planning, you will be able to minimize their impact. How to grow kohlrabi in a pot. Growing kohlrabi means growing a crisp, crunchy and cruciferous garden treat. Your email address will not be published. Space your plants at least 6″ apart – 8″ might be better. The best tasting kohlrabi bulbs out rapidly. To start seeds indoors, start seeds 6 to 8 weeks before planting. Kohlrabi Growing Guide ... to prevent butterflies laying eggs on the underside of leaves but usually matures quickly enough for this not to be a problem. Double digging or raised beds will yield kohlrabi bulbs with tender, non-pithy flesh. The kohlrabi plant can be attacked by cabbage loopers, cutworms, flea beetles, cabbage aphids, and imported cabbage worms. This vegetable’s shape resembles the original Russian Sputnik, an early spacecraft. Bulbs grow above the soil and have a purple exterior with a white flesh. Unlike any of its cousins, kohlrabi is known for its swollen, globe-like stem that forms just above the ground. Kohlrabi is easy to grow and fast to mature, which makes it a great choice for fall or early spring planting. Kohlrabi is susceptible to pests such as flea beetles. Eating As a cool season plant, Kohlrabi tends to bolt into flower in high heat, so it is best to plant early so it can mature in cool weather, or plant … Learn more about growing kohlrabi in the garden and kohlrabi plant spacing here. After 45-60 days, your plants should be ready to harvest. You may see the cabbage looper and beetle. Grow gigantic kohlrabi! The texture is crunchy and is excellent prepared raw as a slaw or an addition to salads. The best way to prevent these diseases is to avoid planting any Brassica species in the same spot for more than two years in a row. Kohlrabi isn’t really bothered by too many pests. Learn more about your crops in our library, Learn about ways to keep your crops healthy, Small dark spots on leaves which turn brown to gray; lesions may be round or angular and may possess a purple-black margin; lesions may form concentric rings, become brittle and crack in center; dark brown elongated lesions may develop on stems and petioles, May become a problem during cool, wet periods, Seedlings develop wilted yellow to brown leaves and collapse; yellow, V-shaped lesions on mature leaf margins; dark rings can be found in the cross section of the stem, an be confused with Fusarium wilt; favors warm wet environments, Slow growing, stunted plants; yellowish leaves which wilt during day and rejuvenate in part at night; swollen, distorted roots; extensive gall formation, Can be difficult to distinguish from nematode damage; fungus can survive in soil for periods in excess of 10 years; can be spread by movement of contaminated soil and irrigation water to uninfected areas, Death of seedlings after germination; brown or black rot girdling stem; seedling may remain upright but stem is constricted and twisted (wirestem), Disease emergence in seedlings favored by cool temperatures, Irregular yellow patches on leaves which turn light brown in color; fluffy gray growth on the undersides of the leaves, Disease emergence favored by cool, moist conditions, Small white patches on upper and lower leaf surfaces which may also show purple blotching; patches coalesce to form a dense powdery layer which coats the leaves; leaves become chlorotic and drop from plant, Disease emergence favored by dry season, moderate temperatures, low humidity and low levels of rainfall, Beet armyworm eggs covered in white hairs, Singular, or closely grouped circular to irregularly shaped holes in foliage; heavy feeding by young larvae leads to skeletonized leaves; shallow, dry wounds on fruit; egg clusters of 50-150 eggs may be present on the leaves; egg clusters are covered in a whitish scale which gives the cluster a cottony or fuzzy appearance; young larvae are pale green to yellow in color while older larvae are generally darker green with a dark and light line running along the side of their body and a pink or yellow underside, Insect can go through 3–5 generations a year, Large populations can cause stunted growth or even plant death; insects may be visible on the plant leaves and are small, grey-green in color and soft bodied and are covered with a white waxy coating; prefer to feed deep down in cabbage head and may be obscured by the leaves, Cabbage aphids feed only on cruciferous plants but may survive on related weed species, Large or small holes in leaves; damage often extensive; caterpillars are pale green with a white lines running down either side of their body; caterpillars are easily distinguished by the way they arch their body when moving; eggs are laid singly, usually on the lower leaf surface close to the leaf margin, and are white or pale green in color, Insects overwinter as pupae in crop debris in soil; adult insect id a dark colored moth; caterpillars have a wide host range, Cutworms will curl up into a characteristic C shape when disturbed, Stems of young transplants or seedlings may be severed at soil line; if infection occurs later, irregular holes are eaten into the surface of fruits; larvae causing the damage are usually active at night and hide during the day in the soil at the base of the plants or in plant debris of toppled plant; larvae are 2.5–5.0 cm (1–2 in) in length; larvae may exhibit a variety of patterns and coloration but will usually curl up into a C-shape when disturbed, Cutworms have a wide host range and attack vegetables including asparagus, bean, cabbage and other crucifers, carrot, celery, corn, lettuce, pea, pepper, potato and tomato, Young larvae feed between upper and lower leaf surface and may be visible when they emerge from small holes on the underside of the leaf; older larvae leave large, irregularly shaped shotholes on leaf undersides, may leave the upper surface intact; larvae may drop from the plant on silk threads if the leaf is disturbed; larvae are small (1 cm/0.3 in) and tapered at both ends; larvae have to prolegs at the rear end that are arranged in a distinctive V-shape, Larvae take between 10 and 14 days to mature and spin a loose, gauze-like cocoon on leaves or stems to pupate, Crucifer flea beetle damage on broccoli leaf, Small holes or pits in leaves that give the foliage a characteristic “shothole” appearance; young plants and seedlings are particularly susceptible; plant growth may be reduced; if damage is severe the plant may be killed; the pest responsible for the damage is a small (1.5–3.0 mm) dark colored beetle which jumps when disturbed; the beetles are often shiny in appearance, Younger plants are more susceptible to flea beetle damage than older ones; older plants can tolerate infestation; flea beetles may overwinter on nearby weed species, in plant debris or in the soil; insects may go through a second or third generation in one year, Large ragged holes in leaves or bored into head; green-brown frass (insect feces) on leaves; caterpillar is green in color and hairy, with a velvet-like appearance; may have faint yellow to orange stripes down back; slow-moving compared with other caterpillars, Larvae can be distinguished from other caterpillars by their sluggish movement; in large numbers larvae can cause extensive damage very quickly, If population is high leaves may be distorted; leaves are covered in coarse stippling and may appear silvery; leaves speckled with black feces; insect is small (1.5 mm) and slender and best viewed using a hand lens; adult thrips are pale yellow to light brown and the nymphs are smaller and lighter in color, Transmit viruses such as Tomato spotted wilt virus; once acquired, the insect retains the ability to transmit the virus for the remainder of its life, Galls on roots which can be up to 3.3 cm (1 in) in diameter but are usually smaller; reduction in plant vigor; yellowing plants which wilt in hot weather, Galls can appear as quickly as a month prior to planting; nematodes prefer sandy soils and damage in areas of field or garden with this type of soil is most likely, Links will be auto-linked.