rosolis76

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rosolis76 last won the day on October 13

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    France
  • Interests
    carnivorous plants, orchids, Araucaria

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  1. Hello, I would like to share with you my little experience of growing Drosera of the Petiolaris group. These magnificent plants are found mainly in northern Australia. The climate consists of a hot period with sometimes very high temperatures (over 35°C) and a high level of soil and air humidity. It is during this period that the Drosera develop their carnivorous leaves. The other part of the year, temperatures are cooler (especially at night) but often remain above 10-15°C while daytime temperatures remain quite high (+25°C). In addition, rains are almost completely absent for several months and only slight humidity subsist in the lower layers of the soil. At this time, the leaves of the Drosera of the Petiolaris complex disappear and give way to a central bud, more or less woolly in appearance. This allows the plant to protect itself from the wind and sun during dry periods. To grow them in Europe, it is most convenient to keep them in a heated greenhouse or terrarium. I personally opted for this second alternative. For reasons of economy but also for better thermal insulation, my terrarium was made from extruded polystyrene. The upper part (the "roof") is of course made of glass to allow artificial light to pass through. Several lighting devices give very good results. In the past, I used classic T8 fluorescent tubes, which are inexpensive to buy but moderately efficient in relation to their electricity consumption. T5 fluorescent tubes, in my experience, give better growing results because they produce more heat and light than T8s at the same operating cost. Plants should be placed less than 30 cm (or even 20 cm) from the tubes in order to make the most of the tubes' power. For heating, waterproof silicone heating cables offer a very good solution, but it is also possible to use an aquarium heater placed in a large water container that will produce heat and increase air humidity at the same time. The disadvantage of this second solution is that the water level around the resistance must be checked regularly so that it remains well submerged. Watering is probably the point that requires the most attention. In summer, it is possible to let the pot bathe in a few centimetres of water. On the other hand, the substrate should be kept slightly moist during the rest period, but not completely dry. Tall pots are very useful because they allow the roots to develop properly, which are often quite long. They also help to keep moisture deep down when the pots are no longer immersed in water. The susbtrate consists of a mixture of peat (60%), sand (30%) and perlite (10%). We hope that this information will be useful to you. Best regards, Damien
  2. Jeff, You can try not giving them dormancy but they will reduce growth anyway ;-). In my experience, D.paradoxa (and hybrids) is the only species that can grow all year without a true dormancy but other species will require it for an healthy development and a long term conservation (more than 2 years). Kindest regards. Damien
  3. Hello Jeff, You can move your seedlings in another pot if you keep enough substrate around the roots. To avoid too much stress, it is always better to consider enough space between each seeds during sowing and not putting too many of them in one pot. I agree with Marcel, heat and high RH are ok if you provide enough light. To me, the biggest challenge with young Pet.sundews is to keep them alive during their first dormancy period when they have only 1 cm in diameter. Good luck ;-) Kindest regards. Damien
  4. Hello Jeff, You can move your seedlings in another pot if you keep enough substrate around the roots. To avoid too much stress, it is always better to consider enough space between each seeds during sowing and not putting too many of them in one pot. I agree with Marcel, heat and high RH are ok if you provide enough light. To me, the biggest challenge with young Pet.sundews is to keep them alive during their first dormancy period when they have only 1 cm in diameter. Good luck ;-) Kindest regards. Damien
  5. Toujours aussi spectaculaire! You are a master JP! Friendly, Damien Toujours aussi spectaculaire! You are a master JP! Friendly, Damien
  6. Hi everyone, Nice topic Rodrigo! Genlisea are so amazing plants! Dead Sphagnum can work well including with G.africana. When I was in Angola, I saw some populations of this last species growing amount living and dead sphagnum whereas other populations were growing on sandy soils. I cultivation, I noticed that dead sphagnum can be really usefull when growing conditions deal with high temperatures and high humidity all year round (in a tropical terrarium for example). However a more "classical" growing media like a mix of peat and sand also works really well in the most cases. All the best, Damien
  7. Wonderful Christian, many thanks for sharing!
  8. Dear growers, To start the year, I would like to share with you some pictures I took today. First, a beautiful flower of U.fulva: U.pubescens: Then, some pictures of Drosera which is one of my favourite genus: The rare D.chimaera growing slowly: D.roraimae from Serra do Araca and its amazing pink-red colour: A nice form of D.latifolia: A nice group of D.capensis WF x aliciae I hope you like them. All the best, Damien
  9. I wish you all the best for this new year! Let's grow!!!
  10. Dear Daniel, I am also really really sorry about what happened to you and your family, I was really schocked by the videos of the fire. I send you all my postivie thinkings to overcome this dificult time. Of course, you can also count on me to rebuilt your collection when the situation will be better. Friendly, Damien
  11. Dear growers, I would like to share a strange observation I made with one of my Genlisea clone from Angola. As you can see on the following picture, all the leave of this plant have small white trichomes on their surface: This clone was supposed to be G.hispidula, at least, flowers were really similar to those from the description of this species. It was growing in the Central Region of Angola at about 1.800 m above see level in pure laterite with U.welwitshchii and madagascariensis. I hope you enjoyed this strange Genlisea. Pictures of the flowers will follow soon if they want to open one day :-) All the best, Damien
  12. Hi, I am also really interested in this project. Thank you again for sharing... Regards, Damien