HOT! HOT! HOT!

Culture

by Liese

Originally published in The Florida Orchidist

Posted by Sys Admin over 8 years ago.

Article Blog   Article Index

Ideally, most orchids do best in the 70’s and 80’s, going cooler at night. During mid-summer, when they receive week after week of 90 degree temperatures, they need a bit of extra TLC to keep them happy.

Misting your plants will help to cool them off. In very humid climates, one needs to mist very lightly so that the plants don’t stay too wet. In a hot and DRY climate, one can mist more heavily to create a bit of humidity. The water droplets on the leaves help to cool off your orchids’ leaf tissue.

Shade your plants heavily during hot summers. Think of yourself sitting in the hot sand at the beach. If you sit in the shade, you feel much cooler. Taking a dip in the water (or misting yourself) will bring down your body temperature. The same holds true for plants.

Back off a bit on fertilizer when extreme heat hits. When it’s 95 degrees plus in the greenhouse, I very rarely feel hungry during the day. Orchids also seem to slow down their growth in extreme heat. Skip a week or two of food every so often during those high heat weeks to give your plants a break from the high nitrogen rush!

Air movement is also a key. Just as I like to stand in front of a fan during a warm spell, our orchids also will benefit from extra air movement.

The flowers on those few orchids that are brave enough to bloom this time of year don’t last very long. This time of year our Phalaenopsis fold after 4-6 weeks, whereas during the cooler winter/spring season they last 3-4 MONTHS. This is why most orchids bloom between Thanksgiving and Mother’s Day. Summer is more of a “growing” season for plants.

Try not to add undue stress to your plants during extreme heat. Usually it is fine to repot throughout the summer months. However, when extreme heat hits, it is best to wait a week or two until things cool off. We usually try to repot our most tender orchids in Springtime (March through May), leaving some of the sturdier varieties (i.e. Cattleyas and Dendrobiums, etc.) for summer potting.

If growing in a bark mix, watch for moldy bark (snow mold) this time of year. It is very common due to the high humidity levels. It helps to use a fungicide periodically during very humid months. Physan 20, Captan, and Phyton 27 all will help to keep mold and rot at bay. If you do see mold in your mix, it is usually best (and cheapest) to simply repot the plant in fresh mix.

Share on Social Media:  
Log in to Add a Comment

New Topics

  1. Rae Walker asked question Name help in category General Discussion
  2. John Small asked question Schomburgkia, species or hybrid in category General Discussion
  3. Robert H. Findlay asked question Help with ID of this Eria sp. in category General Discussion
  4. Osura Mindula Gunasena asked question Help to Identify the Id of this Vanda in category General Discussion
  5. Maricarmen Ferreira asked question Care for Myl Quest Fanguito in category General Discussion

New Comments

  1. Robert H. Findlay commented on topic "Help with ID of this Eria sp." by Robert H. Findlay
  2. Carol Holdren commented on topic "Name help" by Rae Walker
  3. Carol Holdren commented on member plant Dtps. Younghome Little Spirit by Heather A
  4. Sara D commented on member plant Den. Green Mist by Sara D
  5. Sara D commented on member plant Phal. bellina var. Coerulea by Sara D
  6. Sara D commented on member plant Pot. Marie Yellow Bird var. Love Love by Sara D
  7. John Small commented on topic "Lady Bug or dangerous bug" by John Small
  8. Carol Holdren commented on topic "Help to Identify the Id of this Vanda" by Osura Mindula Gunasena
  9. Carol Holdren commented on topic "Care for Myl Quest Fanguito " by Maricarmen Ferreira
  10. Roberto Lizama commented on topic "Help to idenficate this orchid" by Roberto Lizama
  11. Mark Ashworth commented on topic "Orchid species search" by Mark Ashworth
  12. Debbie Chase commented on topic "Head on Shot to be Identified" by Debbie Chase
  13. Carol Holdren commented on member plant Phal. Liu's Cute Angel by Mo Chen
  14. Mo Chen commented on member plant Holc. flavescens by Mo Chen
  15. Carol Holdren commented on topic "Identify Orchid" by Debbie Chase
  16. Nilda Vega commented on member plant Bct. Roman Holiday 'Hamlyn' by Terence Kew
  17. Clint Dalrymple commented on member plant Pnr. graminifolia by Clint Dalrymple
  18. Carol Holdren commented on member plant Rth. Beau's Golden Touch 'Touch of Class' by Robert Rand
  19. Robert H. Findlay commented on member plant B. nodosa 'Remar x Mas Mejor' by John Small
  20. Carol Holdren commented on member plant Phal. buyssoniana by Robert Oceans