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What you need:
  • Sterilized pruning shears
  • Clay pot
  • Medium grade fir bark
Dividing and potting orchids can be an intimidating task for beginning orchids growers. Actually, orchids are very enduring plants and dividing and repotting them is really a simple task.
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The best time to repot is directly after blooming when new growth and roots are sprouting.
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First pry the root ball out of the pot. You may need to tap the sides of the pot on the table to loosen the root ball.
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If the plant has three or less pseudo-bulbs, do not divide. It's best to repot it in a larger pot.
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With larger plant, divide by cutting it with sterile pruners or a saw. Each new divisions should have at least four pseudo-bulbs. It's very important to sterilize your pruners before dividing because Cattleya are especially susceptible to viral diseases that can be spread by dirty tools.
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At this time also remove all dead or damaged roots and damaged or dried up pseudo-bulbs.
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Select a clean pot that allows enough room for a few years growth. Clay pots are usually preferred for Cattleyas because they dry out more thoroughly than plastic and are heavier to better support these top-heavy plants. Hold the plant so that the rear pseudo-bulb is against the back of the pot, one inch below the rim of the pot.
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Pour in the potting media, being sure that the roots are well distributed in the pot. Firm the bark with your thumbs so that the repotted plant stands solidly and doesn't wobble.