Orchid Q&A

* Air Conditioning
* Ansellia africana
* Aquarium Water
* Brassavola Care
* Black Growths
* Brassavola Care
* Calanthe Culture
* Catts in Hawaii
* Change of Environment
* Coconut Husk
* Cymbidiella rhodocheila
* Cymbidium Care
* Culture of Alba Orchids
* Dehydration
* Dendrobium Care
* Dendrobium Repotting
* Dendrochilum magnum
* Dormancy
* Dry Conditions
* Epsom Salts
* Eulophia species
* Fertilizer Injector Dosage
* Flowering Vanilla
* Habenaria rhodocheila
* Holcoglossum kimballiana
* Inobulbum munificum
* Jewel Orchids
* Judging Orchids
* Leaf Color
* Leaf Residue
*
Leaftip Burn
* Liparis viridiflora



Q.

Black Growths
The new growth on some of my cattleyas turns black at varying stages, sometimes initially and sometimes later. The plants still looks healthy overall, and might still produce flowers later. I grow orchids well outdoors on the California coast in a protected patio. — P.J. Hatcher

 

A.

This might have any one of several causes. Most probable, based on your description, is that you leave the lights on in your patio at night, and this interrupts the dark cycle, resulting in the burned tips. Otherwise, some sort of fungal or bacterial rot is the culprit, and this is best treated with a copper-based compound such as Kocide or Phyton 27 following label instructions. — Ned Nash

Also see Blasck Rot




Orchid Q&A

* Masdevallia coccinea
* Mastering Miltonias
* Maxillaria sophronitis
* Mealybug Infestation
* Meristemming Monopodials
* Missing Pollen
* Night Length
* Night Lights
* No Flowers
* Non-flowering Doritaenopsis
* Oncostele Wildcat
* Oncidium Sharry Baby
* Orchid Honeydew
* Paphinia herrerae
* Paphiopedilum armeniacum
* Paphiopedilum delenatii
*
Phaius Culture
* Phalaenopsis Problem
*
Phalaenopsis Spiking
* Plant Sitter
* Psychopsis papilio
* Rainwater Collection
* Redwood Bark
* Re-rooting Plants
* Spotted Oncidum Leaves
*
Sticking Flowers
* Storing Pollen
*
The Larger the Better
* Vanda Keiki
* Virus Question
* Volck Oil Spray