Hoya Temperature Tolerance Chart

I have been growing hoyas for several years now. At first, I was very frustrated when several of my hoyas grew very slowly. I couldn't figure out what was wrong. They didn't have pests and had plenty of fertilizer and light.

It wasn't until I started researching Hoya temperature tolerance that I discovered the missing puzzle piece: different Hoya species require entirely different climates to thrive.

Like many indoor plant parents, I was initially growing all of my Hoyas in the exact same room. I didn't pay much attention to the room's climate, allowing it to climb above 80°F (27°C) in the summer and drop into the low 60s (15°C) at night during the winter. I soon learned that while some of my slow-growing plants were desperate for higher heat, others were actually craving colder temperatures.

Why Temperature Matters for Hoya Plant Care

Because the Hoya genus is incredibly diverse, these plants originate from vastly different environments. A species native to the cool, high-altitude mountains of the Himalayas will struggle if forced to grow in the same conditions as a species from the sweltering, humid lowlands of Borneo.

When you don't match a plant to its ideal temperature range, it will often show signs of stress:

• Stalled Growth: A warm-loving Hoya will often stop producing new leaves if the room is too chilly.
• Leaf Discoloration or Drop: Sudden yellowing or dropping leaves can indicate exposure to cold drafts or excessive heat.
• Refusal to Bloom: Many cool-growing Hoyas actually require lower nighttime temperatures to trigger peduncle growth and flowering.

Once I separated my collection into two distinct temperature groups, their growth exploded. I dedicated my main plant room to my cool-growing Hoyas, keeping the thermostat around 75°F (24°C). For my warm-loving Hoyas, I purchased a large indoor grow tent and set it up in a separate room, maintaining a minimum temperature of 85°F (29°C).

The Complete Hoya Temperature Tolerance Chart

To help you optimize your Hoya plant care, I have compiled a complete A-Z chart of all the Hoyas I have grown and the temperatures they prefer.

Use this guide to determine if your specific plant prefers a Cool (50°F to 77°F) or Warm (60°F to 95°F) environment.