Re-pot moth orchids
Moth orchids (Phalaneopsis spp.) need re-potting regularly, and spring is the best time to do this. Young, small plants should be re-potted annually, using a fine-grade bark. As they gain some size, pot them in a medium-grade bark or coarse-grade perlite (bead size 3–6mm), or a blend of the two. This should be done every two years, or when the medium decomposes and becomes too wet. Soggy mix rots the roots.
Gently remove old mix from around the roots and trim off any roots that look soft or damaged. When you’re potting, place some mix at the base of the new pot and then gently spread the roots over the mix before backfilling. If you’re keeping your moth orchid indoors, place it near a bright window, but not in direct sun.
Give the mix a good soaking, then don’t water again until it’s almost dry. Once a week should be about right for now, then increase to twice a week in summer, even daily if needed when the temperature soars. Misting the foliage on hot days provides the type of humidity they like, and giving them a weekly application of liquid orchid fertiliser keeps them growing strongly.