Spring is the best time of year to repot and split orchids and at Writhlington spring starts early. One plant that needed drastic attention was this old plant of Odontoglossum cristatum. A lovely cool growing species from Colombia. It has been growing on the same piece of cork bark for about seven years and it is now in need of splitting up and repotting for a fresh start.
New year is a time we think about all the lovely people we work with around the world. So Happy New Year to our friends in Durban both at the Botanic Garden and at West Park School. Happy New Year as well to the pupils and staff at the Erica Primary School in Cape Town, to Souk and Eddie in Laos, to John, Ian and Judy in Belize, to Ana-Silvia and Federico in Guatemala, to Federico, Vannessa, Franco, Kerry and Bob in Costa Rica, to Izabel, David and Carlhinos in Brazil and all our friends in Sikkim, especially Mohan and Ganden who are second and fifth from the left in this lovely photo from our 2009 expedition to Sikkim. This is the log house at the Fambong Lho reserve in the mountains above Gangtok. Finally a Happy New year to all of you who read our blogs on the RHS. We hope to see you all sometime in 2010
One of the real pleasures of having a greenhouse is escaping those cold gloomy winter days into your own little tropical paradise. This morning I escaped to Brazil thanks to Sophronitis cernua. I had the pleasure of seeing this species in the wild on our last school expedition to the Brazilian costal forest (Mata Atlantica) in 2006. It grows in dryish forest at around 800m altitude and so we grow it with a minimum temperature of 15 degrees Celcius. As you can see from the plant photograph we grow it mounted rather than in a pot. About nine years ago we tied a seedling to a piece of cork and as you can see the plant has grown to completely cover the mount. This year it is flowering really well. This species is pollinated by humming birds.
No not the snow, Dendrobium wattii. Some orchids have the most amazingly crisp white flowers and this Christmas the best white is this stunning Dendrobium native to the Eastern Himalayas of Burma, Thailand and Laos. It is another cool grower and we keep it at a minimum of 10ºC. The orange stripes on the lip are guides to the pollinating bees although this may well be a deceipt poliator as are many long lasting orchids. The flower provides no pollinator reward such as nectar and relies on mimicry or naive pollinators. Research has shown that the closely related species Dendrobium infundibulum mimics a white Rhododendron species. Well, trick flower or not, Dendrobium wattii has won me over.
Writhlington School may be closed for the holiday but the plants in the school greenhouses never take a break. In fact, christmas is a lovely time with lots of plants flowering in the run up to our peak time in March. Most of the plants we grow are cooler growing orchids native to the tropical slopes of mountains like the Himilayas or Andes. The majority of these species flower in the dry season (winter and spring). The current impact plants in our cool end (minimum 7-10 degrees celcius)are the Mexican Laelias. Lealia anceps is native to the mountains in South West Mexico where they grow on oak trees. With us they flower reliably every christmas with long sprays of bright pink flowers. We find the species is easy to growand flower. In Mexico it is used as a central part of the Day of the Dead (El Dia de los Muertos) celebrations. Whether you celebrate El Dia de los Muertos or not, we recommend you have a try at growing Laelia anceps.