Roses are among the most popular blooms that you can grow in your garden. Luckily, you can grow several cultivars and hybrids in your indoor or outdoor space, so you’ll definitely find a rose that works for you. Yet, these delicate creatures have sharp objects that contradict their beauty. So, why do roses grow thorns?
Roses grow thorns or prickles to protect themselves. These sharp projections protect the blooms from intruding animals, birds, and bugs that feed on the blooms. In addition, with the help of the thorns, the flowers are able to survive to produce seeds, so the plant can survive and spread.
Moreover, thorns can provide support for growing roses by allowing them to attach to nearby plants. Furthermore, they maximize the amount of sunlight and water that the rose plant receives.
We’ll talk more about why roses grow thorns and what they’re actually made of. So, read this article to learn more about thorns.
Why Do Roses Have Thorns?
Roses can grow on bushes, trees, and vines, and their blooms come in different colors and shapes. Most roses have thorns, but some roses don’t. Yet, you should be careful while picking a rose because you might get hurt by a hidden thorn that you can’t see.
Roses have thorns or prickles to protect themselves from wildlife creatures that feed on them. They also protect them from humans who want to pick the flowers, interrupting their life cycle. Thorns keep intruders away, so the flower can get fertilized, produce seeds, and help the plant reproduce.
Thanks to their sweet fragrance, roses are extremely appealing to predators, so thorns can keep them away. Thorns represent flowers’ survival mechanism, so they can stay on their stalks for longer periods. Predators, like bugs, feed on the flower’s nectar, depleting their energy. Animals like deer and rabbits also feed on flowers.
Over the years, flowers have developed a mutation to protect themselves. Thorns and roses represent a contradiction due to the delicate nature of flowers and the sharp structure of thorns. With the help of thorns, flowers have a maximum chance of survival.
According to science, these sharp and pointy structures are actually called prickles, not thorns. Prickles are pretty strong and will provide the same benefits, but they have a slightly different structure from thorns. However, only botanists are probably interested in the differences between them. To most gardeners, there are no big differences.
Do All Roses Have Thorns?
No, there are several varieties and cultivars of roses that don’t grow thorns or grow very few thorns. These thornless roses are safe to plant in your garden because your kids and pets can approach them safely.
Several types like Cinderella miniature rose, Amadis thornless rambler rose, thornless climbing roses, thornless English roses, Veilchenblau rambler rose, Oceana hybrid tea rose, and smooth prince hybrid tea rose are free from the sharp prickles. However, if you’re interested in growing roses that have prickles on their stems, you can grow them towards the edge of your garden or in raised garden beds.
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What Are Thorns Made Of?
Thorns grow on the stalks of flowers for protection. Some flowers have spines or prickles, but they serve the same function as thorns.
Thorns are firm extensions with an internal tissue connection with the flower’s stem, so they’re hard to pluck off. Some plants grow spines, which are sharp modifications of leaves.
Prickles are the type of thorns that grow on roses. Unlike typical thorns, prickles grow on the bark of the stem and don’t have internal tissue connections, so they’re easy to get rid of.
Compared to thorns, prickles are relatively soft, so they can be removed. Still, they’re pointy enough to penetrate the skin of an intruder. Prickles are pointed downward just like thorns, and they can grow up to a length of 0.39 inches, depending on the variety of roses you’re growing.
How Do Thorns Protect Roses?
Thorns help roses survive in various ways.
Keep Predators Away
The main job of thorns is to keep predators away. The sharp protrusions on the rose’s stem prevent the predators from approaching the plant and feeding on the blooms.
Climbing small animals like rabbits and squirrels would stay away from roses to avoid getting hurt. Prickles can also keep off curious humans from plucking off roses. However, birds can still land on the blooms from above, and some animals like deer can still feed on flowers, despite the presence of thorns.
Help Roses Survive
The presence of thorns helps roses survive by getting support from nearby plants. The thorns are arched downwards, and other plants provide support, so roses can grow upwards.
Thorns act like hooks, allowing the rose branches to clamper over and reach a higher height. Unfortunately, this means that the neighboring plants might die because they aren’t receiving enough sunlight or nutrients. This is probably why roses are fast growers, as they always win the competition when they’re grown next to other plants.
Receive More Sun
The thorns are sharp protrusions on the stems of roses, and they maximize the surface area of the plant, so it can receive more sunlight. With more sunlight, the plant can perform the photosynthesis process, which provides roses with energy. Compared to other flowering plants, roses will have richer and more vibrant colors because they’re receiving more sunlight.
Get More Water
After the rainfall, the downward direction of the thorns will help direct more water towards the roots. The water droplets fall off the stem easily, so the plant can get hydrated.
Are Roses’ Prickles Poisonous?
The rose prickles don’t emit a poisonous sap that can cause infection. Yet, they can deliver bacterial and fungal spores into the skin and then into the bloodstream if a prickle cuts your skin while you’re touching a flower. Moreover, prickles will have traces from fertilizers and chemicals used in your garden, which shouldn’t get into your bloodstream.
The prickles have pointy ends, which are designed for easy penetration, mainly when pressure is applied. The pain from getting pocked by thorns and prickles is intense because the pointy edge affects the uppermost level of the skin, where the nerves are located. This is why falling on a rose shrub can be extremely painful.
Wearing gardener gloves while handling roses is essential to protect yourself from getting poked. They’re thick enough to prevent thorns from penetrating your skin but they’ll allow you to touch roses safely.
Rose prickles can cause several diseases like the rose picker’s disease. This is a fungal infection, which is mainly caused by getting cut or scratched by a rose prickle. Although this disease isn’t life-threatening, you might be prescribed an antifungal treatment for several months.
Suffering from plant thorn synovitis is also possible if you accidentally touch a rose prickle. In most cases, the doctor will have to perform minor surgery to remove the thorn or prickle from the skin. Finally, when you get injured by a rose prickle, you might suffer from mycetoma, an infection caused by the bacteria and fungi that live in the soil and water.
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Should You Move Prickles From Roses?
Due to all the problems caused by prickles, you might consider removing them from the stems of roses. Prickles aren’t deeply attached to the internal tissues the same way thorns do. Yet. They’re still part of the stem.
This means that removing prickles will do some internal damage. However, this might be the only option if your pets and kids repeatedly get injured by them.
While removing prickles, you need to wear gardener gloves to protect your hands from getting injured. You should also be gentle and try not to cause too much damage to the roses’ stem. Too much damage will affect the plant’s life and might even deprive the rose of another blooming chance.
Moreover, with an exposed wound to the stem, roses will be more prone to bacterial and fungal infections. This is why you need to sterilize your tools before cutting off the prickles and do this only when necessary.
Because they’re not connected to the internal tissues of the plant, prickles don’t have access to the nutrients and water that feed the rose’s stem. So, after being removed from the stem, they won’t grow again. This means that you’re causing permanent damage to the plant, so you should only do this when it’s absolutely needed.
Wrap Up: Why Do Roses Have Thorns?
Roses have thorn-like structures called prickles on their stems. These prickles are sharp, pointy protrusions that keep predators away and help flowers last longer without being eaten. They also provide roses with means of survival by getting support from nearby plants, receiving more sunlight, and directing the rainwater towards the roots.
Several types of roses don’t have thorns or have few ones. These are safer to touch and can be planted where your kids and pets play. In some cases, you can pluck the thorns off the roses’ stems, but you should be very careful as you might hurt yourself or cause permanent damage to the plant.