Appropriate time to repotting the Dendrobium and Phalaenopsis

[abhijit]

What is the appropriate time to repotting the Dendrobium and Phalaenopsis (After flowering or when new root appears)? Here now the time is pre-winter and my Dendrobiums are full of flowers and also the new pseudobulbs appear. And the Phalaenopsis starts to grow their new roots. It’s my experience from previous years that the blooming time of Phals here is March to June and the spike appears from January. So what can I do?

[Ordphien]

I tend to repot right before I know new roots will come.
Or when I see the new roots starting

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[euplusia]

Dendrobiums have a sympodial growth habit. I would wait until the flowers have gone and repot right before the new roots appear.
Phalaenopsis are often complex hybrids. They have a monopodial growth habit. Depending on light, humidity and temperature they are growing year round. Flowering takes energy and is kind of a stress for the plant. Repotting is also stress. Here the flowering season is over in April, which is also the best time for repotting.
My advice for Phalaenopsis is to wait 2-4 weeks after flowering is over. Then you can repot. If June/July are the hottest months in your country, wait until temps grow colder.