Make sure style tip leaves streaks in the pollen. 3. Try to keep them away from wind and excessive vibration. The bark is grey-purple and smooth, and develops vertical fissures with age. …popular conception are the acorn, chestnut, and filbert; other so-called nuts may be botanically a seed (Brazil nut), a legume (peanut [groundnut]), or a drupe (almond and coconut). At that time, the base of the styles can often be seen protruding from the nascent bur. https://www.alamy.com/chestnut-flower-in-a-beautiful-summer-day-image364613213.htmlhttps://www.alamy.com/stock-photo-close-up-portrait-of-a-chestnut-trees-blooming-139948086.htmlhttps://www.alamy.com/stock-photo-castanea-sativa-sweet-or-spanish-chestnut-in-flower-116684097.htmlhttps://www.alamy.com/stock-photo-foliage-of-a-sweet-chestnut-tree-castanea-sativa-with-prickly-fruit-78449048.htmlhttps://www.alamy.com/france-var-massif-des-maures-collobrieres-valley-of-the-aurier-the-forester-fabien-tamboloni-shows-us-chestnut-flowers-image245942798.htmlCastanea sativa Sweet chestnut tree leaves flowersAutumn seasonal fruits and tree backgroundA chestnut brown Icelandic horse grazes in woodland and purple heather at Smart's Heath common, Mayford, Woking, Surrey, UK in autumnhttps://www.alamy.com/stock-photo-sweet-chestnut-castanea-sativa-backley-inclosure-new-forest-national-125991867.htmlFrance, Var, Massif des Maures, Collobrieres, valley of the Aurier, the forester Fabien Tamboloni shows us chestnut flowershttps://www.alamy.com/stock-photo-sweet-chestnut-blossom-tree-summer-tree-pink-sunshine-daylight-closeup-84714633.htmlSpanish chestnut, sweet chestnut (Castanea sativa), blooming branch, male inflorescences, GermanyFlowers and leaves, sweet chestnut (Castanea sativa), Burgenland, Austria Repeat as necessary. Their mature heights vary from the smallest species of chinkapins, often shrubby, to the giant of past American forests, C. dentata that could reach 60 m. Between these extremes are found the Japanese chestnut (C. crenata) at 10 m average; followed by the Chinese chestnut (C. mollissima) at about 15 m, then the European chestnut (C. sativa) around 30 m. You can separate most of the remaining fluff, trash, and bugs from the pollen and anthers by scraping off the top of the pile of pollen and “marching” it away from the rest of the pile. Go to list of cultivars. If the burs have opened too far or some nuts have fallen into the pollination bag, cut or break off the whole branch while holding the nuts, or else bend it into the garbage bag to save the nuts. If you do not want to provide your email, you can choose to use a fake one.) Catkins will keep 1-2 days, longer if refrigerated. Rub one catkin over all the styles of each female flower 4-5 times. Company Flowers will keep 3 to 7 days, longer if refrigerated. Use a clean bag or can for each type of pollen. Each tooth ends in a bristle tip.Chinese chestnut is resistant to chestnut blight which has almost wiped out the American chestnut. Make sure each nut is surrounded by peat moss and not touching other nuts or the side of the bag. The nuts are ready for harvest when the burs begin to open up.American chestnut trees are mostly found in Special thanks to the Sudbury Foundation of Massachusetts for their support of the Regional Adaptability Project.c) Branches or trees should be labeled with information about what pollen or treatment was applied. The red horse-chestnut, a cross between horse-chestnut and red buckeye, is an excellent shade tree for large areas. Therefore at least two chestnut trees need to be near each other for viable nut production.a) Remove bag, pollinate (see below), and resecure bag with a new paper clip or twist’em.a) Very gently remove paper bag from flowers and flowers from jug.Pollinating with dried pollen Place a small sample of pollen in a 1-inch-diameter vial. Castanea dentata is a rapidly growing deciduous hardwood tree, historically reaching up to 30 metres (98 ft) in height, and 3 metres (9.8 ft) in diameter. The 12-day rule is a reliable guide to the best time for pollinating.Learn how to identify American chestnuts and send us a sample to support our research.When you get home, remove the burs from the plastic bag, count them and record the count for that cross. This is around the last week in September, first week in October in the mountains from Georgia north to Maine. The styles are white or yellow, whereas the remainder of the female flower is green. Do not mix the jug, bucket, paper bag, razor blade, and paper towel between types of pollen. In weevil-infested orchards, this reduces weevil damage so that nuts needn’t be hot-water treated nor trees sprayed. Refrigerate the nuts at 34 F until planting or shipping time.b) Puff up the bag, place over shoot, twist on base and secure with a jumbo paper clip or a twist’em. The tag will be less likely to fall out of a hole in the bag if it’s inside the white bag which is inside the black bag. This will have to be repeated up to thrice weekly. Tape the lid to vial to make sure the lid won’t come off in shipping! TACF's next live Chestnut Chat on Friday, September 18, at 11:30 AM will feature Kendra Collins, TACF's New England Regional Science Coordinator and Eric Jenkins, Meadowview Tree Breeding Coordinator, discussing the ins and outs of a successful chestnut harvest. It may be advisable to test it every day or so during the pollination season. These often split open and fall to the ground when the nuts are ripe.