This is from the St. Augustine Orchid Society newsletter. Are the novely Phals considered intergenerics?
Courtney introduced our guest
speaker, Alan Koch of Gold Country Orchids. Courtney
first met Alan in North Carolina when the orchid groups
would share guest speakers and someone had to drive
the speaker from one location to another. They have
been orchid friends ever since the 80's. Alan's talk tonight
was on Phalaenopsis/Vanda Intergenerics. Intergeneric
Phalaenopsis hybrids are easier to grow than Phalaenopsis,
maintain the flowers longer and bloom more often than a
normal Phalaenopsis plus many are even fragrant. The
bright colors, fragrant flowers and smaller hardier plants
were part of the reason he likes hybridizing them.
Alan said his love for Intergenerics started while he was
judging the Taiwan international orchid shows. He said the
college students would make crosses to get seedlings.
If a large nursery purchased their seedlings, they could
get thousands of dollars for one cross. It made for a lot
of competition and variety. Alan also likes Intergenerics
because one never has crown rot, absolutely never except
for one plant, Irene Dobkins. He advises never buying this
plant because he has never had one live for him. He then
showed a slide of Phal. Aphrodite which had a spectacular
array of inflorescences filled with white flowers. This was
achieved by not letting the plant flower for three years,
annually repotting, which produced a strong root system
and then when let to flower, it burst out full of them. Another
slide from the Taiwan show was of a C. skinneri with 702
flowers
Alan stated that breeding is important but your culture
is more critical. Water, water, water is the most important
key to good growing. He waters three times a session
noting that the harder your water, the longer you water. He
advises to water once to wet the surface, the second time
with fertilizer to wet surface and media, and the third time to
leach the plant and flush salts from the media. A discussion
occurred about how long to water, and Alan said it depends
upon humidity and water quality. He usually waters for 45
minutes once a week but during the current hot spells in
California, twice a week. He is also misting his plans several
times a day to cool them down, but with his low humidity
the leaves dry quickly so he doesn't have a problem with
the misting causing rots like we would here in Florida. He
showed a slide of a test he conducted by growing identical
seedlings for three months, half with RO water and the
other half with well water. There was a striking difference in
the plants grown with RO water.
Alan strongly encouraged using a well-balanced fertilizer
and recommended MSU formulas for either hard water or
rainwater. He suggested reading materials on rainwater by
Dotty Woodson. When one sees the long green root tips,
the plant is in active growth and has the greatest need for
fertilizer. When the root tips shorten and aren't as bright
green, the growth rate is slowing. For micronutrients, he
suggested Plantex 20-20-20 Classic Water Soluble Fertilizer,
which has twice the normal amount of trace elements, and
STEM by Peters. Another fertilizer that provides calcium
and micros is Metalosate (which smells like soy sauce due
to the presence of amino acids). Calcium is needed by
orchids in order to build strong cell walls, increase disease
resistance and promote strong flowering.
For the Intergenerics, Alan suggested that one can use
any media as long as it is of high quality and has good
drainage. Many of the intergenerics are made using Doritis
(now Phalaenopsis) pulcherrima that grows on rocks, so it
needs to dry out in-between waterings. Other Intergenerics
can grow in clay pots with moss but since the roots
photosynthesize, he normally uses clear plastic pots or
mounts. Mounted plants are easier to flush. He uses panty
hose to secure the plant to the mount and joked that's the
only good use for panty hose. Plants that tend to stay wet
in nature are more salt sensitive and need to be flushed
more.
Alan ended his presentation with slides of various types
of Intergenerics. Many of the intergenerics are made with
Doritis pulcherrima and Rhynchostylis gigantea. One very
cute intergeneric is Vandaenopsis Newberry Whimsy, made
with V. cristata and Phal. philippinensis. One to avoid is
Vandaenopsis Irene Dobkin, that no one seems to be able
to keep alive. However, some of its offspring like Jiaho's
Orange can be found in cultivation.