New try. After slaughtering the first two batches of dendrobiums I deflasked I decided to try another. This time the newly deflasked plants are being placed in an Aerogarden seed tray. It’s only been a day but so far so good.
Today (Aug 13, 2014) my order of Dendrobium Moschatum from eBay arrived. These were grown in a flask, unflasked by grower prior to shipping.
Much like cuttings started in water these will grow new roots to replace the ones they grew in the flask. For now they’ll stay in a terrarium to keep the humidity up. As they grow new roots and leaves I’ll start leaving the cover off eventually planting them up in pots.
I tried putting them worm castings and sphagnum moss in the terrarium and inserting the plants. They are so fragile now that wasn’t really working. I removed them and took each plant, made a ball of moss around the roots and inserted that into the terrarium.
I’m told newly unflasked plants do better when they are kept near their siblings? I don’t know, maybe so. These are closely planted in two terrariums sorted by plant size.
The terrariums have worm castings and sphagnum moss, they’ll be weakly fertilized with rooting hormone added as the terrariums need more water.
The biggest trick is to keep up the humidity but not let molds or fungus attack the new seedlings.
Aug 15th, leaving the cover off the terrariums for a while, the seedlings still look good, so I’ll start to harden them off.
Aug 26th, I’ve started leaving them outside in a mostly shaded area. So far I haven’t lost any plants. The stems are thickening up a little, no new leaves yet.
Sept 13th, all the orchids are still alive. They are not much, if any, taller, but the stems are noticeably thicker.
Oct 6, 2014 The seedlings are struggling and I’m not sure why. They are receiving bright morning sun, there’s a fluorescent lamp nearby, the cover is off the terrarium. The other newly un-flasked orchids in the container next to them are doing great.
Feb 2015. I killed all of these. Unflasking plants into pots is more challenging than I thought it would be.
But I have a new batch, they are in an AeroGrow garden, semi-hydroponic setup.
First Rays, semi-hydroponics for orchids