Stefan S.

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Stefan S. last won the day on July 10 2012

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About Stefan S.

  • Birthday 02/21/1987

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  1. Hi! A few photos of some of my Drosera: D. cistiflora D. lowrie D. neocaledonica D. kaieteurensis D. camporupestris D. tentaculata seedlings D. spiralis seedlings D. regia D. graomogolensis D. tomentosa 'Morro do Jambeiro' D. felix The odd one out: U. babui Enjoy!
  2. Hi! A few pictures of a mixed Drosera pot (graomogolensis, hamiltonii, burmannii). Happend quite accidentally. Regards, Stefan
  3. Hi! I just unboxed my new camera (Olympus SZ-16) and took a few pictures. I found the macro function quite impressive. They may not be the best pictures, I'll have to try different settings and get some experience. Here goes: P. moctezumae P. gypsicola U. babui D. tomentosa var. glabrata Serra do Caraca Stowaway D. burmannii D. felix (I guess I'll be having some seeds for sale soon ;) ) Regards, Stefan
  4. Hi! Thanks for your answer. I'll try gentler sterilisation, either a weaker solution of NaDCC or just regular bleach plus shorter sterilization times. Regards, Stefan
  5. Hi! I've been growing carnivorous plants for some years now and finally decided to have a go at tissue culture. I bought a kit from and have been experimenting for about two months now. First I tried a 50% MS medium with 1mg/L PPM-compliant solution and 25g/L sugar with some seeds and cuttings. Of the seeds only D. regia and P. moctezumae germinated (and are also still alive, though not really thriving), the smaller seeds (various Drosera species) haven't germinated and I suppose they won't. Of the cutting all died (ie. turned black) within a few days. No mould though. I tried again a few days ago with some seeds and Drosera and Pinguicula (winter) leaves. This time I made a 30% MS medium using 6-BAP for the Drosera (0,5mg/L). So far most of the Drosera leaves are black. The few that are alive have turned red (phenol?) on the exposed parts. The Pinguicula leaves have turned transparent in places. There are also black streaks visible in the medium at the cut edges of some of the leaves. But there is no mould. I sterilized the plant material using the NaDCC included in the kit (after a short dip in isopropanol) and then did a rinse of a few minutes in water+PPM. I boiled the medium and then filled it into the vessels, putting them into the microwave and again boiling for 1 min. I sterilize my tools with isopropanol and work in an aquarium lying on its side. PH is more of a guesswork since I only have ph paper, though it should me in the ballpark of 5-6. My main concern is whether I overdo sterilization thus killing the plants or whether the leaves die because of invisible microorganisms that devour them. I hope some of the tissue culture experts on the forum have some advice for me. Thanks! Regards, Stefan
  6. Very beautifully coloured and healthy looking plants!
  7. Thanks! I'll change it in my growlist.
  8. Hi! This question is to all the Drosera experts out there. I've got some plants whose seeds I received as "Drosera montana var. tomentosa (hairless scapes) ‘Serra do Caraca, Minas Gerais, Brazil’" Now that they are flowering I could see that the scapes are really hairless (except for a few occansional hairs), whereas my other D. tomentosas (Morro Do Jambeiro) are quite hairy. Is this the distinguishing feature between tomentosa and tomentosa var. glabrata? Should my tomentosa 'Serra do Caraca' (hairless scapes) be really called D. tomentosa var. glabrata? Thanks!
  9. Hi! I want to introduce you to my latest project: A DIY "Terra Control" device for controlling temperature and humidity. Perhaps it's useful to other people beside myself. If you buy those devices from your local (or online) pet store they tend to be quite expensive, despite the fact that they are really very simple. Just a sensor for humidity/temperature plus a human interface plus a relay connected to a power plug. As I was searching for an idea for a new microcontroller poroject I thought: "Why not build one of those myself?" And here's the result: Features: selectable target day and night temperatures adjustable daytime (from 6 to 23) selectable target humidity switching between heating and cooling mode switching between heating/cooling according to daytime or heating/cooling off 3 buttons + LCD as user interface 1 Power plug for a heating device (e.g. heating cable, heating mat) 1 Power plug for a cooling device (e.g. a fan) 1 Power plug for a humidifying device (e.g. a fogger) Now for the used hardware: Atmel Atmega8 microcontroller LM35 temperature sensor DHT-11 temperature and humidity sensor PCF8583 real time clock 3 bottons as input 1 LCD module (HD44780 compatible) 3 pieces 5 Volt relay module 1 modified PC power supply Here's a picture of the board: This is the modified PC power supply with built-in (or should I rather say squeezed-in) relay modules and wiring: The sensors that you position inside your terrarium: That's what the LCD shows you (temp. day, temp. night, current temp., current time, duration of day, target humidity, current humidity, heat/cool, timer/off): Neary all of the parts were bought on ebay (from China) where they are very cheap. For example: The Atmega8 costs about 4€ here at home whereas I get it on ebay for 1,10€ (free postage). Now some quick instructions on how to build your own Terra Control: If you know how to solder and to read a schematic (and/or make your own PCB) you can build one yourself. The modification of the PC power supply was a bit tricky (because of the restricted space). There are lots of manuals on how to do get a PC power supply to run without a PC on the internet. You just have to solder 2 wires together and put a load of about 500mA on the supply for it to start (and continue) running. Then it's just a question of finding the supply's 230V output (be very careful!) and solder some wires on for your relays. Then you need to find the 5V and GND of the supply (usually a bunch of red and black wires coming out of the supply) and wire those to your relays. Then you solder your circuit together, program the microcontroller and you're ready to go. (There are programmers for 3€ on ebay). If you're interested in the schematic and code and which parts exactly to buy on ebay feel free to contact me. Regards, Stefan
  10. Wow! You've really got an amazing collection! Loved also you D.'Shibata', it's really a beauty and I hope it'll get 'spread around' a bit soon. Do you know how far it is already distributed in cultivation? BTW: is the D. felix from my seeds? Regards, Stefan
  11. Absolutely stunning plants (as always)! Thanks for sharing them!
  12. Hi! Very nice pics! btw: shouldn't it be "flower" instead of "flour"? Regards, Stefan
  13. What a pretty flower! Congratulations! Regards, Stefan
  14. Hi! I've got two forms of Drosera tomentosa and I'm a bit confused about the variation called glabrata. The first one is: D. tomentosa 'Morro Do Jambeiro, Grao Mogol, Minas Gerais, Brazil' and the secon one: D. tomentosa (hairless scapes) 'Serra do Caraca, Minas Gerais, Brazil' Is the second one equivalent to D. tomentosa var. glabrata from the same location? And is the the first one the "plain" D. tomentosa? Perhaps Fernando or another expert can help me? Regards, Stefan