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Old 04-02-2007, 11:15 AM
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Thumbs up Repotting & Dividing Orchids Info

Repotting and Dividing Orchids




There are so many "big" questions when discussing orchid growing. How often do I water? What kind of fertilizer should I use? What is the best potting mix? Hobbyists feel comfortable with these questions and easily understand the answers. There are, however, questions hobbyists fear to ask because they fear the answers. Two topics that trigger this reaction are dividing and repotting orchids. Hobbyists that brave the questions usually will walk away shaking their heads knowing they should not have asked and promise never to ask again. So let’s put this in writing to be read in private and practiced without anyone even knowing! Let’s begin one step at a time. When do I divide and repot my orchid? That simple question has two parts. Part A: When does my orchid need to be divided or repotted? Part B: When is the best time to divide my orchid? These are simple questions with simple answers really!

There are signs that indicate the need for repotting and/or dividing your orchid. One year your cattleya produced 20 magnificent 15-centimetre flowers. The next year it produced only 6 flowers that measured 10 centimeters across on only one side of the plant. Another sign is that the newest growth is smaller than the last growth. Each new growth should mature taller and stronger than the previous growth. These are the two most dependable guides. Would it be best for the orchid if I just repotted it into new mix or would it be best if I divided it and repotted the divisions? This all depends on how large the orchid. If the orchid is outgrowing a four-inch pot, repotting is most likely the solution. If the root mass is cracking an eight-inch clay pot (you are an excellent grower!), dividing and repotting this magnificent specimen would be the best choice. Another important consideration is the condition of the orchid. If the orchid is starting to deteriorate with lots of old shrivelled back bulbs or if the centre of the plant is dying off as the outer parts continue to thrive, then it would be best to divide the orchid, discarding the dying parts. If you have decided that your orchid in a 4inch pot has outgrown its container, repot it after it has flowered. Clean off the old medium entirely and simply step it up to a new six-inch pot with new potting medium.

Now you have grown this orchid into a specimen that even impresses you! The plant is in great condition, but it’s just too big or has moved past its prime. Now it is time to consider dividing and repotting. Bookmark this: The orchid is a lady. Timing is everything! The orchid will decide when to divide and later when to repot. You are no longer in control. She will direct you. Once you accept this, you and your orchids will bond. Divide only when your orchid is putting out new leads. By dividing when she is in this stage of growth, more new growth will be activated. To divide, select the place or places to cut the orchid. Cut through the rhizome with a sharp, sterile instrument. Sprinkle a little cinnamon on the newly cut rhizome and mark the division with a clean label or a piece of bark. These markers will make it obvious where the surgery was done. This completes the dividing segment. Set the plant back on the bench and water and fertilize her as usual. Wait for her signal to repot. Be patient. Repotting is next, but it may be several months before its time.

Timing is everything. You are doing what is best for the orchid. She will reward you. Watch for new roots. The time to repot is when your orchid is establishing new roots. Allow the roots to grow to two to three inches before repotting. Remove the plant from the pot, wash off all old medium, and gently separate all the divisions you have created.

Now you may repot all of the new divisions. This two-step procedure will reward you with stronger divisions that will bloom sooner than if divided and repotted at your convenience. You have lessened the stress of major surgery. Most of these divisions will bloom during their next bloom cycle. That’s the reward! Finally, if your orchid has gone way, way past it’s prime, it might be best for the orchid to just be repotted. Then let it gain strength before dividing. Growing orchids is fun and rewarding. Dividing and repotting your orchids is part of the fun. All you have to do is let your plants tell you what they want - just like any lady. And if you do what she wants, she’ll reward you with lots of wonderful blooms!

Happy growing.
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Old 04-04-2007, 03:25 AM
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I repot at the very first sign of roots starting from the new growth. Waiting for 2" to 3" is dangerous, because if you damage these roots in the repotting, you may get no further root activity. A difference of 3 weeks or so is not going to make any difference to the out come, but damage to these roots can leave the plant rootless for a year.

A good indicator of time to repot is a mix that starts to hold too much water or for too long. Also, bark can be tested for condition by pressing down on the top of the bark. If your finger goes into the mix, the plant needs repotting at the next opportunity (new roots from new growth).
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Old 04-10-2007, 03:54 PM
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[QUOTE=wileng1] I have a Phal with leaves which have sprouted out of a node on the spike. Should I cut the leaves off of the spike and pot it? I've never potted or repotted a Phal before. What is the procedure?
Wileng


congrats, you're a grandpa. wait until those leaves grow their own roots, at least four inches' worth, before taking it off the spike and potting it.
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