Temperature regime for my hoyas.

How warm (or cool) is the room where my hoyas grow? Do I use any special heating tools for my hoyas? Are there hoyas that grow better in the cool?

As I have mentioned before, hoyas are very diverse and the temperature regime that one or another hoya wants may also be quite different. For example, I grew my hoya Clemensiorum Borneo, which by definition wants a temperature range for growth from +15* to +30* Celsius, until this fall on an east-facing windowsill, on which in the summer it could sometimes reach as high as +27* Celsius, if the outside air temperature was similar, but in the winter around +18* to +22* Celsius, because the window still gives off a cool breeze and then the hoya calmly went into hibernation, not particularly experiencing such temperature changes. But this fall I moved Clemensiorum Borneo, which is already a fairly large and heavy plant, to my desk, next to the hoya stand, from which the hoya receives a little more and longer illumination from the plant lamps (compared to the amount of light on the windowsill) and the temperature is about +22* Celsius, quite stable and unchanged from day to day. But this union - the amount/duration of light and warmth - made the hoya forget about winter sleep and the hoya Clemensiorum Borneo figured out that it could also grow further, now, in December, starting to grow even 2 mustaches at a time.

Or for example, the hoya Caudata Sumatra likes warmth, around +22* Celsius, but it can also withstand a range from +15* to +30* Celsius. It should be understood that these two temperatures are still extreme temperatures, I think they are definitely not desirable in everyday life and like most hoya, the hoya Caudata Sumatra also does not tolerate drafts. That's why I no longer keep my Hoya Caudata Sumatra on the windowsill, only deeper in the room, under the lighting of plant lamps.

In our latitudes, in Latvia, the challenge is when the seasons change - autumn and spring transitions, until we turn on our heating modes indoors. During this period, you have to be quite attentive, the lower the temperature at which your Hoya grows, the less water it will consume. And it's better to use the opportunity to keep the Hoya more dry during this period, allowing the substrate to dry out. Even in the autumn/winter period, if I have any Hoyas on my windowsills, I use pads under the pots to slightly reduce the impact of cold windowsills on the roots. There are Hoya growers who also use special mats as heating elements, but I can't comment on this here, because I have no such experience.

But there are Hoyas that like coolness and feel miserable in the heat (in our summers). Such a distinctly cool-loving hoya in my collection is hoya Linearis, which completely shed its leaves in the summer, but when autumn came, it recovered and is now growing very well, although next to plant lamps. And hoya Linearis also blooms only in the fall, it seems that in this way she also indirectly shows what she really thinks about the summer heat:) My hoya Linearis also tried to form 2 flower buds this fall, but apparently it did not have enough strength to form a full-fledged flower bud and bloom, because it is too young a plant that has had to struggle in the summer. Nothing, there will be other autumns and I am patient:)

This fall, two hoyas on the windowsill also behaved differently - hoya Incrassata variegata Moonshadow and hoya cv. Irina - both, as they discussed, in October, when the day length is already getting shorter, the sun shines less often and it is quite cool, because the heating is not yet turned on, began to activate new shoots, hoya cv. Irina bloomed in October and formed 4 new leaves, but now it has stopped and decided to hibernate anyway:), but hoya Incrassata variegata Moonshadow still continues to grow several of its whiskers and scorch some new leaves, although on the windowsill it is about +18* to +20* Celsius. And if we look at what the growing temperature of these two hoyas is, then we see that they prefer temperatures from +10* to +25* Celsius.

There is also a rather long list of hoyas, the growing temperatures of which are indicated from +5* to +20* Celsius, if the ambient temperature is higher, the hoya may most likely stop its growth. Such hoyas are various varieties Carnosa, Pubicalyx, Lacunosa, Rotundiflora, Linearis, etc. Hoya Sulawesiana Green also belongs to the cool-loving hoyas (+5* - ​​+20* Celsius), but for now it is still in my Ikea Milsbo greenhouse cabinet, because I recently transplanted the rooted cutting and want it to get used to the new, larger, self-watering pot a little. It is possible that later I will move it to a shelf in the room under the plant lamps, because the temperature of the Ikea Milsbo greenhouse cabinet might be too high for growth, although it is still actively stretching its first mustache and is starting to try to give its first leaves and does not worry about the temperature of +28* Celsius at all:).

And in conclusion - I invite you to look at the link here again and study what growth temperature is, by definition, the most optimal for your hoya and try to provide such a temperature regime.

The good news:) - hoyas are quite hardy and all temperatures have a fairly wide range (up to 15* Celsius), which means that when growing hoya, the ambient temperature is of course important, but hoyas are ready and can also adapt perfectly:)

Good luck!

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