Why Does Cactus Have Thorns? Cacti are beautiful plants. I mean that’s why you have a few of them around, right? We’re guilty of it for sure … But with this good look, comes the grueling task of having to deal with the thorns, or rather spines as they’re usually referred to in botanical circles. Yes, they may add to the beauty of these plants (with a variety of colors and sizes). But what if they were a bit, say, tender? Well, if the spines existed for the sole purpose of sitting around your home just maybe that would have been possible. But we all know where they were really meant to be – out there in mostly dry environments braving the harshest of conditions. And these spines play a huge role in this coping. They’re an adaptation that has ensured the survival of cacti out there in places where a majority of floral is non-existent. These thorns range from the long and blatantly don’t-mess-with-us types to the small, fine, and yet vicious glochids. Despite this, their functions are more or less the same. @designs4seasons Purpose of Thorns on Cactus Plant Let’s get to it! Shade by day insulation by night A thing with desert temperatures is that they’re always swinging to the extremes – day and night. During the day, temperatures are sky-high with the shining sun. As the day wears off and the sun disappears in the opposite direction, a downward spiral in readings kicks in resulting in very cold nights. Now, these aren’t very nice fluctuations for any living thing out there. And that’s where thorns save the day for cacti. The number of some species adds up to form a considerable amount of cover for the plant. So, during the day, the cactus plant is safe from the scalding hot sun (and the accompanying high temperatures). During the night when temperatures are bottom low, the cactus plant is kept warm by a thin layer of air – attributable to the thorns. @kaktusyesilii Protection from predators A known fact: there is very little vegetation in the desert. But you know what? Still, there is a considerable number of herbivores that need food in the same desert. They need vegetation to keep going. And water, of course. Cacti would have been great sources for both of the above. Only that they would have been extinct by now, maybe. Most of these animals wouldn’t dare touch the cacti. So, definitely, they have their thorns to thank for that. Well, it’s true that some desert animals still have a way around the spines and do manage to get a bite (pack rats, bighorn sheep, desert tortoise, etc). But it’s also true that the sharp thorns have kept away lots of others from munching the cactuses out of existence. I mean seriously, would you ever want to munch on something like a cactus, talk about a very painful dental visit. @mymagicworld.gardenpet Diffusing Light Cacti are light-loving by nature. Each part has to get plenty of it for the plants to grow accordingly. But sometimes this is not possible largely due to the style of growth of some. For instance, shrubby ones. Light is going to reach just a few stems. Well, that’s if the cactus plant was just a smooth-stemmed structure. But bless the thorns –they split up light, evenly distributing it around the whole plant. Water traps In fog-prevalent deserts, thorns are quite instrumental in quenching the plant. They trap enough of this fog to turn it into water droplets that later find their way down around the base of the plant. With the shallow root system common in cacti, the water is quickly absorbed by the plant. And the cacti live on. ALSO READ: Are Cactus Thorns Poisonous if they Prick Your Skin? Everything about the Crown of Thorns Succulent 7 Mini Garden Hand Tools For Your Succulents|Succulent City @mymagicworld.gardenpet Air traps As mentioned above, thorns trap air around cacti that is pivotal in the survival of the plant two major ways. Insulation is one. The other is water preservation. The thin film of air reduces the rate of evaporation of water from the plant. As a result, very little of this water is lost to the atmosphere. In a desert setting, this is a huge deal. Propagation Certainly not all. Especially not the large ones. Glochids are the ones that serve this purpose perfectly in some cacti plants like Cholla. The glochids are tiny, numerous, and quickly (and firmly) attached to a passing body due to their barbed shafts. That way, segments of the plant are carried from the parent to some other place where they form new plants upon being dropped. @designs4seasons Wrapping Things Up That’s how these thorns have helped cacti survive in the wild. The thorns could be pointless now, you know, with all the care these plants get as houseplants. But their prickly parts are not going away anytime soon. Who knows, maybe they will as they spend more time in pots. But, that will definitely take a lot of years. If you’d like this read you’re going to love our full in-depth ebooks! With so many of our succulent lovers asking for more, we listened and can’t wait to share it with you here! With our very detailed ebooks, you’ll get more information than these short articles, some ebooks are 30+ pages, perfect for a weekend read. Related TweetPin266Share266 Shares ABOUT ME Richard Miller Salute everyone. It's Richard, the author of this Succulent & Xeriscaping blog. I am a traveler and a nature lover looking for a connection with the wild green. In my journey, I found a love for succulents and xeriscaping. What attracts me is the long-lasting & unique beauty of every plant I have the chance to see with my own eyes. Welcome to my little blog and let's enjoy a good time together! Contact me: richard.succulentcity@gmail.com Leave a Reply Cancel replyYou must be logged in to post a comment. This site uses Akismet to reduce spam. Learn how your comment data is processed. Connect with us on social! Pinterest Instagram YouTube Facebook