|Stanhopea tigrina "Glory of Mexico" with new maturing growth from late winter (left). Stanhopea posadae with new growth started in early spring (center). Stanhopa anfracta with new growth started in spring (right).|
These differences between the growth cycles of different species may be due to cultural conditions, or the maturity of the Stanhopea plant. The species that grow intermittently through the year may be because they are the best adapted to the growing conditions that I have, and thus grow almost continuously. In addition, these Stanhopea that grow well may be doing so because they are some of the largest specimens that I have and happily grow throughout the year. This latter option may not be very consistent because two of my large Stanhopea (S. ruckeri and S. shuttleworthii) only produce one growth cycle per year. It will be interesting to see if these observations of growth cycles remain consistent or vary over time and as the plants age. It would be appreciated if those of you who have different growing conditions than mine (e.g., greenhouse conditions or a tropical climate) could post some of your observations. Knowing when Stanhopea start new growth cycles and when they bloom allows us to determine the best time to transplant them (either spring or fall) depending on the species. I usually attempt to re-basket Stanhopea just before a new growth cycle begins while the plant is dormant, and either before or just after flowering for the year.
|Stanhopea frymirei (left), Stanhopea impressa (center), and Stanhopea nigripes (right) with new growth starting in mid-spring.|