Kaktus said:This is to confirm that H. Mirabilis like a cooler temperature. These 2 is a buy 1 get 1 free, from the same vendor and arrived at the same day, I think arrived on the 12th. The top one I keep in a cooler area and the bottom one I kept in a hotter area, both do not exposed to direct sunlight. In 8 days we can see that the top one grows thicker, the window open up. The bottom one become thinner and closing the leaves. I think the temperature difference on the 2 will have 4 celcius degree difference at noon time.
Note: I assume both Haworthias have a good root system 
@kaktus
Tjoe thanks for sharing. In these situations I think we need to consider light , water and temperature because these issues are often interrelated . How is the temp difference created in the above situation ? Is it not possible that the hotter plant is seeing more sunlight and therefore UV ? We known that sun exposure has a dramatic effect on plants . In nature increasing temp is usually related to more sun exposure . A plant that sees more sun will use more water in its leaves . If you gave your hotter plant more water could it be possible that it would look more like the cooler plant but grow more ?
What do you think the two actual temps are for hot and cold in your situation
Not trying to be clever here or say that your statement is wrong . I just think we need to understand clearly what's happening because often more variables are at play than we think .This is why it is so hard for us all to agree exact methods of care for our plants apart from very general stuff like drain holes and as much light as possible indoors :
Steve
