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|Check Dormancy Table to SEE WHAT'S GROWING & WHAT'S DORMANT|
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Dormancy Table & Hardiness Map
|By James Feucht, PhD, 2005 Colorado State University Cooperative Extension ~ Dormancy in Northern Hemisphere plants is caused by chemical changes within plant cells. It is stimulated by cooling temperatures and shorter days in late summer and fall. This "binds" water so it cannot freeze and injure plant cells. To break dormancy, plants must first go through a period of cold (about 40 degrees F or colder) for an average of 63 days. This cold period triggers changes which, when warm weather appears, allows plants to "deharden" and resume growth.||Winter Dormant Summer growers
This group is generally regarded as the “summer growers”. They have adapted to our northern hemisphere cycle & are dormant from November through February. Many of these will also enter a pseudo rest period for a few weeks during the hottest part of the summer before putting ona a final burst of growth in September and October.
|Summer Dormant Winter growers
Usually referred to as the “winter growers”, these genera are dormant during the warmer months of May through August. Their primary growth actually occurs during autumn and spring while slowing considerably during true winter. Many will exhibit marginal growth during the summer months as well especially in the Lily and Crassulaceae families.
|Adenia, Adenium, Agave, Alluadia, Aloinopsis rubrolineata, brachystelma, Bursera, Calibanus, Ceropegia, Cissus, Cyphotstemma, Didieria, Dorstenia, Echeveria, Encephalartos, Euphorbia, Ficus, Fockea, Huernia, Ibervillea, Ipomoea, Jatropha, Lithops, Monadenium, Moringa, Operculicarya, Pachypodium, Pedilanthus, Plumeria, Pseudolithos, Pterodiscus, Raphionacme, Siningia, Stapelianthus, Synadenium, Tillandsia, Titanopsis, Trichocaulon, Trichodiadema, Xerosicyos||Adromischus, Aeonium, Aloe, Anacampseros, Astroloba, Avonia, Bowiea, Bulbine, Ceraria, Conophytum, Cotyledon, Crassula, Dioscorea, Dudleya, Fouqueria, Gasteria, Gibbaeum, Graptopetalum, Graptoveria, Haemanthus, Haworthia, Kalanchoe, Neohenricia, Othonna, Pachycormus, Pachyphytum, Pachyveria, Pelargonium, Peperomia, Portulacaria, Sansevieria, Sarcocaulon, Sedeveria, Sedum, Senecio, Stomatium, Sulcorebutia rauschii, Talinum, Tylecodon|