yves

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yves last won the day on September 10 2019

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  1. Just keep an eye open on the net, sometime there are some offers. Yves
  2. Hi Gary It seems cuttings go through 2 phases, first: production of roots from the piece of petiole. That's the case of first picture. Then there is production of a little tuber, 0.5 - 1cm diam. The first stem is producted by this little tuber. At the begining, there is just a green eye on the tuber and a few roots start to grow at the base of this green shoot. Only after these roots develop, the stem will start to grow. So, when stems grow, there is already a tuber. Tropicbreeze: I don't agree with you, the first step of growth is dead easy, there is no dormancy and stems will grow one after another. (one to one and a half year) Problems arrive with the first real dormancy, tubers dry very fast if kept to dry but also rot fast if kept to wet. In addition, tuber will awake when it wants. On my experience, longer is the dormancy, tougher is the awakening. Yves
  3. Hello After 6 months finger crossed, I had the chance to succeed in A, titanum leaf cutting. Nothing really new, I just followed this recipe : http://forums.gardenweb.com/discussions/1686545/amorphophallus-titanum-leaf-cutting Cut a part of the leaf the 4th April, in July I was obliged to repot the cuttings because of a substrate gnat infestation, just took the opportunity to take a pic. 5 rooted leaf portions out of 7, then I had to wait 2 more months before the first stem appeared. Yves
  4. Hi Marc Just one word : congrats Yves
  5. yves

    Stinking bad

    Just for fun Yves
  6. yves

    P. calderoniae

    Hello everbody For the second time, I have this species in flower. Here is a few pics. Yves
  7. Hi Fernando You are absolutely right, It is interesting to see the morphological differences between both clones. It would be interesting as you said, to collect some more field data. On my opinion, despite it doesn't form plantlets at the top of leaves, it is more related to P. medusina regarding the shape of flower. Yves
  8. Dear Fischermans I don't agree with you. There are many differences between both of them. It is at least a subsp. P. heterophylla grows on clay, P. spec. Tonala on gypsum. P. spec. Tonala doesn't form large leaves at the beginning of growing period. The shape of flower is quite different. Yves
  9. Hi everbody Finally this one would like to flower this year. Cheers Yves
  10. Hi Sean Thanks for these wonderful pics. Pleased you are back Yves
  11. Hello For the first I have P. calderoniae in flower, extremely flashy colour. Yves
  12. Seems they are doing pretty well. Congrats Urs Yves
  13. Hi More simple, just mix 10 gr of sulfuric acid (37%) with 90 gr of water You will have a 3.7% solution Linuxman : Just be careful you mix volume and weight :-) Yves
  14. Hi Stephan Very impressive as usual Yves
  15. Hi Never try another acid, because sulfuric acid works very well. Don't think acetic acid will work, not strong enough certainly hydrochloric acid will also work. Many seeds can germinate only after having beeing eaten by birds. ( that's why I try with sulfuric acid, it is not as smelly as hydrochloric acid). Yves