Orchid Q&A

* Air Conditioning
* Ansellia africana
* Aquarium Water
* Brassavola Care
* Brassavola Little Stars
* Black Growths
* Brassavola Care
* Calanthe Culture
* Catts in Hawaii
* Change of Environment
* Coconut Husk
* Cymbidiella rhodocheila
* Cymbidium Care
* Cymbidium Foliage
* Culture of Alba Orchids
* Dehydration
* Dendrobium Care
* Dendrobium Repotting
* Dendrochilum magnum
* Dormancy
* Dry Conditions
* Encyclia lancifolia
* 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


Redwood Bark
Is an orchid potting mix that contains redwood bark safe to use with orchids? I seem to remember reading that baskets made out of redwood secrete some sort of substance that is toxic to orchids. However, the only orchid mix I can find lists redwood bark as a minor ingredient. Is this okay to use? — Deborah Dillon



Redwood bark, either as a fiber or as chunks, has long been an optional component of fir-bark-based potting media. It has been used by itself with some success, as well. It was used in fir-bark mixes to lower pH, to help with moisture retention, to reduce some soil-borne pests and, some thought, to increase the life of the mix. It was also thought to discourage snow mold in pots. Redwood baskets were also rather commonly used on the west coast until redwood became rare. — Ned Nash

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