Question
White Spots
Hi. My mother recently bought me a phalaenopsis plant from the farmer's market about 5 days ago. When I checked the plant to see if it's time for it to be watered, I noticed some white spots which looks like fungus or bacteria growing inside the potting mix (also growing in clusters.) There's also some algae growing in the pot. The leaves, roots and the flowers are still healthy. I'd like to know what the white spots are and what I should do, and if I should worry about the algae. Thanks.
AnswerAshley, the white spots inside the container look like a component of the potting mix called perlite. It is there to help keep the potting mix open. It does look as though you have healthy roots, but they are a bit cramped, so, when it goes out of bloom, I recommend that you repot it to fresh orchid potting mix and a somewhat larger plastic pot with lots of drainage holes in the bottom. Once you have a bag of orchid potting mix and the new pot, soak a portion of the potting mix for an hour or so. Most orchid potting mix contains, among other ingredients, pieces of fir bark and perlite. The fir bark repels water so soaking it helps to break down that repellancy prior to use. While soaking the fresh orchid potting mix, remove the plant from its pot and rinse off the roots thoroughly. If there are any mushy or stringy roots, remove them prior to repotting as only the firm roots are healthy and will lead to new growth. Slowly lower the roots into the new pot while rotating the pot to help prevent root damage. Then, add the wet, fresh orchid potting mix, tapping the sides of the pot to help distribute the mix amongst the roots. Place the pot where it can drain before returning the plant to its growing area. You may wish to clean the old container as you may be able to reuse it for your next orchid plant. Water it once per week. Feel free to ask any followup questions as they occur. Thanks for the opportunity to be of help.
