Arachnis culture

Arachnis Maggie Oei 'Red Ribbon', a hybrid

Arachnis flos-aeris var. insignis, the storied "Black Orchid" is, in truth, deep red

Arachnis Maggie Oei 'Yellow Ribbon" An extremely hardy and common plant in PR

A Vandachnis Coronation is a hybrid of Vandopsis lissochiloides x Arachnis Maggie Oei. It is a slow growing, large sized plant that blooms once a week and produces long lasting leathery flowers that favor the Arachnis parent.

Because of their ecology Arachnis plants can be difficult to culture and bloom if certain things are not done.

1. An Arachnis plant needs a good root system to grow and bloom well and to survive the effects of full sunlight. A young plant with few roots that is grown exposed to full sunlight will grow very slowly and if it blooms it will bloom weakly. So you need to keep the base in the shade in a pot filled with bark and leafmold. A touch of cattle manure can do wonders.

2. You have to replicate the plant's journey to the canopy, this is done by tying the plant to a suitably sturdy post, this should be positioned so that the plant eventually reaches a spot where it is receiving full sun during most of the day.

3. When the plant has reached a height that has the tip of the stem receiving full sun and has started blooming, allow it to grow about two feet more and then bend (but not break) the stalk to the side. The bent stalk will mimic what happens to plants that protrude too much from the canopy. The bent tip will continue growing and blooming albeit not as vigorously as before. But after the tip of the stalk is bent you will notice a new stem growing just under the spot where you bent the stem. Continue bending down new stems and cutting the tips that are blooming too poorly. Plant them near the base of the first plant.

4. Continue planting stems and enjoying the results, give stem props to neighbors so that they can plant their own plants.

5. Enjoy the ever enlarging mass of Arachnis that is decorating your house and your neighbors house.

6. Start getting nervous and paranoid about the sheer mass of orchids that is now growing all around your county. You know they are talking about you.

7. Grab a machete and your loved ones and hack your way out to freedom away from the encroaching ever growing orchids.

8. Flee the country.

9. In your new residence buy an innocuous looking "fast growing"orchid.

Dendrobium anosmum var. huttoni culture

Late last year I was offered a large, two cane keiki, of Dendrobium anomum var. huttonii (it was a particularly fine example of this semi-alba type). It was an offer I could not refuse, as high quality plants of these type are seldom offered for sale. Unfortunately the keiki was attached to a cane of the mother plant that had been bent until it was attached to the mount of the mother plant. This was done to let the keiki attach itself to the fern pole where the mother plant was growing. This meant that removing the keiki would result in a loss of most of its roots. This would result in a severe setback for this young plant and could add years to the wait for flowers. Cutting a piece of the mount was out of question as this would damage the mother plant root ball.Several measures were taken to insure that the keiki would not be set back too severely. These are detailed in the following paragraphs so you can use them if there is the need.It is important to note that what I did can be generalized to other Dendrobiums relatively similar in growth to anosmum such as aphyllum, primulinum, lituiflorum and parishii. However this method might not be advisable with other dendrobium groups.The first thing done was to cut a generous portion of the cane that held the keiki to have as much reserve tissue for the keiki as possible, the keiki was not detached from the cane. Then the unattached roots were NOT PUT IN the potting mix. Roots that develop in the air fare very poorly when buried in the media.These dendrobiums need heavy fertilizing and watering when in full growth, the few measly roots this plant had would not suffice to sustain good growth if it didn't receive intensive care for the first few months. So a creative solution was need to insure the plant got enough humidity and fertilizer, in those critical first months.I made a wire basket with a hole in the bottom. The basket was filled with media that was composed of bark and horse manure. The media was carefully arranged inside the basket. In the center just over where the keiki the basket had (the keiki was very firmly attached so it would not wiggle and damage fragile new roots) a core of very hard, dry horse manure pieces. The horse manure core was put in so that water would drip over the base of the keiki every time the mix got wet. the horse manure core was surrounded by medium size bark so that the plant was provided with an open, oxygenated area where the roots could grow and attach. The bark also concealed the manure which could be an offensive sight for some.The keiki was attached to the bottom of the basket so that the plant would grow and hang like they do in nature. The first few weeks the plant produced a few roots that grew slowly, however as it developed a larger root mass, root production accelerated and it started embracing the media. As you can see in the photos the plant is producing many, many roots and they are rapidly infiltrating the media. The green root tips of the developing roots are quite long, an indication of vigorous root growth. Hopefully this plant will bloom next year. If you compare this potting strategy with a previous post by me on potting of dendrobiums of the spathulata/phalaenanthe group you will notice the strategies are radically different. This shows the need to do some experimenting when growing your own plants and the fact that there is no one size fits all way of growing these magnificent orchids.The brown roots hanging in the air are the original air roots that survived the removal of the keiki from the mount, every other root is new

Dendrobium hybrid culture

Dendrobium Thongchai Gold

Each year vast multitudes of these popular Dendrobium hybrids are sent to that great orchid terracota pot in the sky by well meaning growers. The problem that Dendrobium that are descended from crosses of the Sphatulata and the Phalaenopsis section of Dendrobium pose to the average grower is both perplexing and contradictory. On one hand they are heavy feeders that demand good watering and fertilizing when growing, on the other, overwatering and too much fertilizer are deadly to these orchids. As a result these plants are carefully cared by people who love them in ways that slowly but surely kill them. The first error is potting these plants in an overly large pot, this is a death sentence. These plants need good oxygenation of the roots, a mix that has poorly ventilated spots or even anoxic areas will kill the roots in no time. The best solution is to pot these plants in pots that allow for plenty of air flow. This last week end I was visiting relatives in a seaside area of the town of Rincon. People there cultivate these dendrobiums on palm trunks. Putting most orchids in a palm trunk that has the consistency of concrete, in full sun, in an area subject to strong winds and the occasional sea spray is almost a sure death sentence, these Dendrobium however survive and even thrive. Since a photo is worth a thousand words here are some photos so you can see for yourself how these plants do under conditions that most plants would find too severe to survive.

Bletia patula a pale color form

This flowers show a typical coloration,

they were growing a few feet from the pale colored flower.

A very pale flower of Bletia patula

Every so often I grab my backpack and hike into the island forests looking for orchids. I was lucky enough to secure the company of a friend who is just giving up smoking and was quite desperate for anything that would keep his mind off smoking and him away from other smokers. After a few hours of hiking we came upon a huge area where, for some reason, the all vegetation was killed some years ago by the government. Plants have been slow to colonize this patch but you could see here and there small Bletia patula plants growing inter sped with a host of pioneer plant species, mostly grasses. Unfortunately there was only a single B. patula plant in bloom that I could see in the whole area. When I was photographing the plant my friend calling at me from some distance away telling about a plant that might be an orchid. Looking at the plant from a distance I assumed that probably it was the white form of Spathoglottis plicata, which can be found by the thousands in some valleys in the central mountains. But I decided to take a look just in case. When I got near the plant i realized that it could be a Spathoglottis, it had the wrong shape and the inflorescence was too short. Initially I was quite excited at the prospect of having found an alba form of Bletia patula, however the buds were light pink even if the flower was almost white. I have seen groups many thousands of plants of B. patula in many places in the northwestern part of the island and I have never seen a white form. I might be wrong but as far as I know only one alba form of this species has ever been found. This plant is not an alba, but what it could be called, a near alba, semi alba? I am posting a photo here in the hope that someone who knows more about this species might offer some enlightening comment on this plant. By the way I didn't collect this plant, I can't say I wasn't mighty tempted but decided that it will remain in place until I can ascertain if the government plans to eradicate the plants in the area again. In case that the government has plans to keep killing the vegetation in this spot(I think it is done with herbicides) I will move the plant to a secure place inside a state forest where I can keep visiting it. It is possible that I would have missed this plant completely if my friend had not looked at it closely mainly because I would not have associated the light color flowers nodding in the distance with B. patula flowers.

Psychilis krugii at Guanica State Forest

On February 27, 2006, I went to Guanica State Forest to try to find and photograph some variations of the orchid Psychilis krugi. The area is very dry and hot and during the "wet" season it is also horribly mosquito infested (now is the dry season). I had a hard time finding somebody to accompany me. I asked a female friend if she could go with me. I told her that there would be poisonous plants, the odd loathsome insect and fearsomely prickly cactus. She said that she would go since it would be a refreshing change from having to deal with her ex-husband.I went to an area that is rarely visited as the most well traveled areas have been nearly stripped of orchids.We had to hike for a while but when we arrived we found hundreds of plants but very, very few flowers. In fact we saw only three flowers. However the plants had many inflorescenses and probably in a month or two there will be a huge number of flowers.

Vanda tricolor var. suavis, seed pod releasing seed to the wind

I don't recall ever seeing anywhere a picture of the orchid seed being released from a seed capsule. So I decided to photograph the newly opened capsule of a Vanda tricolor var. suavis that is near my shade house and to share the pictures with all of you that might want to see it. This seed capsule reached maturity after about a year of the flower being pollinated. It was naturally pollinated by a local species of solitary bee. The first time I moved the capsule an impressively dense red cloud of seed was released. Unfortunately I was not able to photograph this event. The photograph shows the second event of seed dispersal. I moved the capsule from side to side to stimulate the release of the seed. You can see as the light weight seed floats in the air as a cloud of reddish points. Every surface in the near proximity of the Vanda was sprinkled with some seed but the Phaius plants growing near had their leaves covered with a particularly generous dusting of seeds. It is uncertain if any seed will survive as we are in the peak of the dry season. But just in case I will be on the lookout for any seedling that might develop in near by in any orchid pot, you never know!