lettuce transplant shock

You can reduce transplant shock by avoiding too rapid growth and by hardening the plants. To create a clearer picture of how blindness develops, the project tried to identify factors that could either induce or prevent blindness in susceptible lettuce varieties. One tip is to transplant them in the late afternoon when the sun has already gone down a bit. For ... and Cole crops. Fact sheets about Reducing transplant shock in lettuce and Management of blindness in lettuce seedlings can be downloaded from the Soil Wealth website. Multiple heading, or “blindness”, is a physiological disorder which can affect up to 20 per cent of lettuce crops in Australia. Blindness and transplant shock are two important issues affecting lettuce growers. Interestingly, four different forms of blindness were identified which can all look superficially similar, but the causes are different. Another issue facing seedling producers is transplant shock – a check in growth that can occur when seedlings are transplanted from the seedling tray into the field. in response … Small plants are acceptable, as long as the roots fill the plug and you can transplant them satisfactorily. Transplant iceberg, romaine, and butterhead lettuce 10–12" apart in rows 15–18" apart, other types 8–10" apart in rows 12–18", and mini heads as close as 6" in a grid. Germinate lettuce seed at less than 20 degrees Celsius. Expose the plants to outside conditions during the last 2 to 3 days before transplanting. Shout out to fish emulsion, which always moves the plants along at top growing speed. I cover the over-seeding method, show you 3 weeks of growth, the transplant basics and touch on feeding and acclimation. In order to look at how we can help the plant through this time, we’ll divide these stresses into three different categories: environmental changes, physical damage, and nutritional deficiencies. This fact sheet provides guidance on the ideal age of transplants and tips for avoiding transplant shock. Stresses due to root damage, changed environment or water stress can all contribute to transplant shock. Transplant young seedlings into 2"-3" containers when they have two true leaves and grow on until planted in the field. Transplant shock is a check in growth that can occur when seedlings are transplanted from the seedling tray into the field. Spacing is more important for head lettuce than with other types. Do not spray when plants are stressed under extremely hot conditions. apart. VG12017 was funded by Hort Innovation using the vegetable research and development levy and contributions from the Australian Government. Use good-quality, non-saline irrigation water, grow varieties less susceptible to blindness and don’t spray when plants are stressed to avoid burning seedlings. Leaf scorchfirst appears as a yellowing or bronzing of tissue between the veinsor along the margins of leaves of deciduous plants (those that losetheir leaves in winter). Lettuce seedlings grow quickly, typically requiring transplanting within four weeks of germination. Giving romaine lettuce plenty of room to grow results in larger heads. Step 5- Prune & Transplant your Lettuce Plant into a Larger Pot. Controlling transplant shock in lettuce NEW RESEARCH UNDERTAKEN BY APPLIED HORTICULTURAL RESEARCH SHOWS THAT DRENCHING LETTUCE SEEDLINGS WITH POTASSIUM NITRATE AT TRANSPLANTING CAN INCREASE YIELDS BY 20 PER CENT. Stresses due to root damage, changed environment or water stress can all contribute to transplant shock. Key practices for reducing blindness in lettuce are to mist seedlings at temperatures over 35 degrees Celsius, use good-quality irrigation water without excessive chorine, don’t spray when plants are stressed and apply foliar calcium twice-weekly. Highly prevalent in New South Wales and Queensland during the summer months, blindness occurs when the main apical shoot or growing tip of the lettuce is lost during the seedling’s early growth. Transplant shock is really the sum of all the stresses plants experience during the move from flat to field. Great video footage that you won't find anywhere else. Controlling multiple heading and transplant shock in lettuce. This article gives you several useful tips that you should bear in mind the next time you need to transplant lettuce. Then the plants will have the dark of night to rest. Containerized transplants or plugs allow separately grown plants to be transplanted with the roots and soil intact. Grow non-susceptible lettuce varieties. Blindness in lettuce results in multiple heading in mature plants, causing the lettuce to be unsaleable. “The incidence increased after some hot spells, but not after others, so factors other than just high temperature and humidity must be involved.”. News & Media To ease the shock of being set out in the garden in mid- or late-summer heat, shade transplants for a few days and keep them well watered. Starting Direct sow or start indoors and transplant. On needled ever… Even perfect-looking pepper plants often just sit in the ground for two to three weeks before reestablishing vigorous growth. This trial is seeking ways to overcome or prevent blindness in lettuce—increasing the “Despite some certainty that high temperatures and humidity were key factors, the trials demonstrated that the incidence of blindness was extremely variable. But not so with peppers. Drenching with potassium nitrate increased leaf growth, particularly early in growth. When it comes to reducing transplant shock of lettuce seedlings, Mr Goldwater suggests drenching with potassium nitrate, which can also increase early growth. Set transplants or thin seedlings 10 to 12 inches apart. Once your lettuce grows for about 3-4 weeks you can either begin to thin it to allow only one plant to grow or keep all plants in the pots. Remember: the growing medium has a different physical structure to the soil into which the lettuce is transplanted. Lettuces seldom recover from blindness, developing into a distorted, unmarketable plant. I have successfully transplanted lettuce, but probably at lower temps. The more roots that come with the plant, the less likely transplant shock in plants will set in. Controlling multiple heading and transplant shock in lettuce was a strategic levy investment under the Hort Innovation Vegetable Fund. Applying nitrogen and potassium to seedlings as a potassium nitrate drench just before transplanting can help plants overcome transplant shock. Use good-quality irrigation water with an EC below 900 μs/cm (including nutrients) and avoid excessive chlorine. The increase in early growth resulted in larger lettuces at harvest in the first trial, although in a second trial, the effect was reduced at harvest maturity. Water thoroughly after transplanting An important transplant shock preventer is to make sure that your plant re… Emerging technology and precision agriculture, Insect, nematode and mite management and crop protection, Wet & warm continued: seasonal climate outlook for vegetable growing regions – February to April 2021, Integrated weed management (Webinar 2 of 3): How cover cropping can improve its use for vegetable growers, Integrated weed management - Nutgrass (Cyperus rotundus), Wet end to 2020 - Seasonal climate outlook for vegetable growing regions (October - December 2020), Get prepared: Irrigation scheduling tips for summer, Use of remote sensing technology in vegetable weed control and yield prediction, Using mycorrhizae to boost vegetable crop quality and yield, Salinity and potato production (Part 4 of 4): Organic soil amendments, biologicals & biostimulants. Apply a foliar spray of chelated calcium twice-weekly during early development. Nutritionally, Romaine has all … Figure 5: Cos lettuce head weights at harvest. After they reached a hearty height, I planted them into my raised bed. Stresses due to root damage, changed environment or water stress can all contribute to transplant shock, resulting in poor plant stands and a lower percentage cut of good-quality lettuce. Hi, Since you say you are about to start your lettuce, I imagine you are talking about seedlings? Project VG12017 examined blindness and the resulting problem of multiple heading, as well as transplant shock and its effect on harvestable lettuce yield. Also check that there is no J-rooting. Commercial growers employ what are called containerized and non-containerized transplant production. During the transplant, a few bean seedlings can be inserted next to the lettuce. Space romaine plants at least 12 inches (30 cm.) Romaine grows in tall heads of sturdy leaves and is very heat tolerant. 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