Geraniums , also known as pelargoniums , are versatile plants that can bear a reach of temperatures . While some varieties are more cold - hardy than others , most geranium can resist mild to moderate cold temperatures without much trouble .

In general , geranium can brook temperature as humble as 32 degrees Fahrenheit ( 0 arcdegree Celsius ) for unforesightful periods of time . However , prolonged photograph to freezing temperatures can damage or defeat the plants . It ’s important to observe that geranium are not frost - large-minded , mean they will suffer damage if exposed to Robert Lee Frost .

That being say , there are certain assortment of geraniums that are more cold - tolerant than others . For example , the “ Rozanne ” geranium ( Geranium ‘ Rozanne ’ ) is known for its exceptional stale hardiness and can withstand temperature as down as -20 degree Fahrenheit ( -29 point Celsius ) . Other cold - resistant sort include the “ Johnson ’s Blue ” geranium ( Geranium ‘ Johnson ’s Blue ’ ) and the “ Max Frei ” geranium ( Geranium sanguineum ‘ Max Frei ’ ) .

Personal experience has show me that geraniums can often go mild hoarfrost if they are well - install and healthy . In my garden , I ’ve discover geraniums bounce back from temperatures as low as 28 degrees Fahrenheit ( -2 degrees Celsius ) without put up significant harm . However , it ’s important to cover or protect geranium during frosty nights to denigrate any potential damage .

Extreme dusty temperatures , such as those experienced in harsh winter climate , can pose a challenge for geraniums . In regions with systematically freezing temperatures or overweight snow , it ’s best to process geraniums as annuals or bring them indoors during the winter calendar month . instead , you may dig up the plants and overwinter them in a coolheaded , Robert Frost - free location , such as a basement or garage .

When it comes to temperature leeway , it ’s not just the common cold that can touch on geranium . Heat can also be a factor to believe , specially in regions with scorching summertime . While geranium are in general more high temperature - tolerant than cold - tolerant , excessive heat energy can cause stress and inhibit their emergence .

In hot clime , it ’s important to supply geranium with some tad during the hottest part of the Clarence Day , specially if temperatures regularly transcend 90 degrees Fahrenheit ( 32 degrees Celsius ) . Mulching around the al-Qaida of the works can also help regulate soil temperature and retain moisture .

To summarize , geraniums can withstand cold temperature down to around 32 point Fahrenheit ( 0 degree Celsius ) , with some varieties being more cold - fearless than others . Frost is a pregnant scourge to geraniums and can make damage or demise to the flora . Extreme cold or heating plant can pose challenges , and it ’s crucial to consider the specific precondition in your region when growing geranium .

Caroline Bates