Saturday, September 8, 2012

Cattleya lueddemanniana coerulea x semi-alba

Cattleya lueddemanniana coerulea (Amparo x Siquisiqui AM/AOS)Each week I go through the EBay plant listing of Steve Christoffersen just to drool over them. He has been selling a lot of seedlings to make room after selecting some plants to bloom from each flask. Cattleya lueddemanniana coerulea x semi-alba - Plant photo by Richard LindbergCattleya lueddemanniana coerulea (Amparo x Siquisiqui AM/AOS)He has made the pricing attractive because he will have to move his plants later this year. I finally broke down and bought one of the NBS pots.

Cattleya lueddemanniana semi-alba 'Margret' AM/AOSCattleya lueddemanniana grows on the northern coast of Venezuela. It is fragrant, warm to hot growing and needs bright light. It blooms in summer or fall.

This plant is in sphagnum in a 2 3/4-inch clay pot. There are five pseudobulbs and the plant stands five inches above the pot. The roots are outstanding and I am going to re-pot it right away. I will have to loosen the roots and remove the old sphagnum. A simple up-pot will not do here.

This cross is Catt lueddemanniana coerulea (Amparo x Siquisiqui AM/AOS) x semi-alba 'Margret' AM/AOS. The flower pictures are of the parents from the listing. I can't wait to see the lip pattern and take my own flower picture.


  1. Hi Richard, i've been following your blog for a long time and i figured it was about time a told you that it is brilliant and that i've learnt a lot from it. i have to try really hard not to go down to the shade house and chop all my orchids into cuttings... i'm trying to get as many specimens as possible :)

    i'm also thinking of moving a lot of my plants over to sphagnum moss this year because you seem to have very good results with it, and i'm going into my final year of Highschool so i need a medium thats a bit more water retentive so that i don't have to worry about watering them as much.... would you be able to give me some tips on sphag moss please?

  2. Thanks Michael. I was slow to use sphagnum because Catts are supposed to be in a medium that dries out. Well, sphagnum can dry too, if you let it. So two things.

    First, use clay pots and keep them small. I am still working on that but I am getting better at having the roots fit the pot.

    Second, realize that sphagnum is more wet than it seems. Pack the sphagnum pretty tight and don't water if there is any give to the surface. It should feel quite hard.

    Fall is not a good time to re-pot Catts. Wait for new growth at the beginning of the summer season.

    As for other types, I have Phals in plastic and sphagnum. Plants that need more even moisture like sphagnum. Even so, wait a couple of days past when you think you should water.

    Hope that helps.

    1. thanks Richard,
      i'm in Australia so i'm just starting to make up my mind about what to do in the way of growing medium because down here we've just gone into spring

      thanks so much for the tips,

      i did have my phals in coconut husk chips, but i'm now moving them all over to sphag this year

      as for the clay pots is that because they aid in drying out that sphag?

      also, so wait until the surface is nice and hard and brittle?

      thanks again richard, and thankyou for the quick reply

    2. Yes, clay is needed because it gets the "soggy" phase done with quickly after watering. Catts don't like wet roots.

      There should be no give at all to the top surface of the sphag. Even though it seems that the sphag must be rock-hard and you are killing the plant, in reality the sphag is still moist.