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Blossom Drop

Disorderalso: Flower drop, Blossom abortion

A physiological disorder in which a plant sheds its flowers without setting fruit, most often because of temperature stress. It frustrates gardeners growing tomatoes and peppers in hot summers or cold spells, when the plants bloom heavily but the blossoms simply fall off and no fruit forms.

🔎 How to spot it

The flowers wilt, yellow at the base of the stalk, and drop off, leaving bare flower stems and little or no fruit set, even though the plant itself looks healthy and vigorous. It shows up during a stretch of unusually hot or cold weather. The lack of fruit despite plenty of bloom is the giveaway.

🥀 Damage it causes

The harm is lost yield: the plant flowers but fails to set fruit during the stress period, so a hot or cold spell can mean weeks with no tomatoes or peppers forming. The plants are not killed or diseased, and they usually set fruit again once the weather moderates. The setback is to the timing and size of the harvest, not to plant health.

🔬 What causes it

Blossom drop is triggered mainly by temperatures outside the range in which pollen works: tomato and pepper flowers abort when nights stay above the low seventies or days climb past the upper eighties to ninety, and also when nights drop below the mid fifties. Other stresses add to it, including drought, overly high nitrogen that pushes leafy growth over flowering, poor pollination in still or muggy air, and heavy insect or disease pressure.

🛡️ Prevent it

Choose heat-set or cold-tolerant varieties suited to your climate, and time plantings so flowering avoids the most extreme heat where possible. Keep plants evenly watered, mulch to steady soil moisture and temperature, and avoid excess nitrogen fertilizer. In intense heat, shade cloth over the plants during the hottest part of the day reduces flower loss.

🧯 If it is already here

There is no treatment for flowers already dropped; the practical response is to relieve stress and wait, since plants almost always resume setting fruit when temperatures return to a comfortable range. Water consistently, provide temporary shade in a heat wave, and ease off high-nitrogen feeding. Gently shaking flowering tomato plants can improve pollination when poor fruit set is the issue.

💡 Good to know

Blossom drop is a weather problem far more than a disease, so it tends to clear up on its own as the season moderates. Matching variety to climate, such as heat-set tomatoes for hot regions, is the most dependable fix. A vigorous plant covered in flowers but setting no fruit during a heat wave is the classic picture.

🌱 Plants it affects

144 plants in the library can be affected by this problem

Acorn SquashAdirondack Blue PotatoAdzuki BeanAji Amarillo Pepper🥔All Blue PotatoAmish Paste TomatoAnaheim PepperArmenian CucumberAtlantic Giant PumpkinBanana PepperBeauregard Sweet Potato🍅Beefmaster TomatoBetter Boy Tomato🍅Big Beef TomatoBig Boy TomatoBitter MelonBlack BeanBlack Beauty EggplantBlack Beauty ZucchiniBlack Cherry Tomato🍉Black Diamond WatermelonBlack Krim TomatoBlack-Eyed PeaBlue Bird Rose of SharonBlue Lake Green Bean🥒Boston Pickling Cucumber🍅Box Car Willie TomatoBrandywine TomatoBroad Windsor Fava BeanBurgundy OkraButtercup SquashButternut SquashCannellini BeanCantaloupeCarolina Reaper PepperCasaba MelonCayenne PepperCelebrity TomatoCharleston Gray WatermelonCherokee Purple TomatoCinderella PumpkinClemson Spineless OkraCostata Romanesco ZucchiniCranberry BeanCrenshaw MelonCrimson Sweet WatermelonCubanelle PepperCupani Sweet PeaDelicata Squash🥒Diva CucumberEarly Girl TomatoEdamame🥒English CucumberEnglish Shelling PeaFairy Tale EggplantField PeaFingerling PotatoFordhook 242 Lima BeanFresno PepperGalia MelonGerman Butterball Potato🍅German Queen TomatoGhost PepperGreen Bell PepperGreen Zebra TomatoHabanero PepperHoneydew MelonHubbard SquashHungarian Wax PepperIndigo Rose TomatoItalian EggplantJack-O-Lantern PumpkinJalapeño PepperJapanese Eggplant🍉Jubilee WatermelonJuliet Grape TomatoKabocha SquashKellogg's Breakfast TomatoKennebec PotatoKentucky Wonder Pole BeanKidney BeanKirby Cucumber🍅La Roma IV TomatoLemon Boy TomatoLemon CucumberLincoln PeaMarketmore Cucumber🍉Mini Love Watermelon🍉Moon and Stars Watermelon🍅Mortgage Lifter TomatoMr. Stripey TomatoMung BeanNavy BeanNorland PotatoOrange Bell Pepper🍉Orangeglo WatermelonPadrón PepperPattypan SquashPersian CucumberPickling Cucumber

For educational and informational purposes only. Disease management advice is general guidance drawn from university cooperative extension sources; always identify a problem positively and read and follow the label on any product before use, especially around food crops, children, and pets.