cold damage on cactus, Matucana cold damage

Cold Damage on Matucana Cactus- The causes & How to prevent.

Hi Guys 😀 

In this Article I will be talking about cold damage on Matucana Cactus plants, what causes it, what it looks like and how to treat it and to prevent it from happening again.

For lots of Tips and Tricks on growing Cacti and Succulents please check out my You Tube Channel called Desert Plants of Avalon and don’t forget to Subscribe.

A little bit about Matucana Cacti

Matucana are a genus of Cacti that are mostly globular, but can become more columnar as they age, these cacti are mostly solitary, but some may form clumps as they mature.

There are approximately 20 species of Matucana in this Genus

Matucana are only found growing naturally in their habitat in Peru, they grow at altitudes from 6,000 to 13,000 feet in the Andes Mountains, and although these cacti are getting more popular to grow in cultivation, in its natural Habitat in Peru it is getting more critically endangered.

The flowers on Matucana are very beautiful and can be red, pink, yellow or orange, but red is the most commonly seen flower colour, ( see image below ). These cacti will flower from about 3-5 years old when grown from seed. 

Matucana, Matucana madisonorum, Matucana madisonorum flowers, Matucana flowers,
My Matucana madisonorum cactus in beautiful red flower, note how more columnar in shape it is compared to my other Matucana on the left, these cacti are globular but can grow more columnar as they mature.

Stay tuned for a special care video on Matucana coming up in the next few weeks on my You Tube Channel called Desert Plants of Avalon, where I will be sharing care tips and tricks on How to grow Matucana.

Cold Damage on Matucana & the Causes

I grow quite a few Matucana in my collection and although ideally they prefer to overwinter at a Winter temperature no lower than 10c / 50F , I do find that as long as my Matucana cacti are kept totally dry with no water given at all from mid September until April then they overwinter in my Polytunnel with no problems at temperatures no lower than 5c /41F .

However this Winter was a bit of a different one and I know there will be a lot of other growers that will agree with me, this Winter was unusually a lot colder in December in the U.K and Ireland and I know a lot of growers in Europe and in the U.S also experienced colder than normal temperatures this Winter, with mnay below freezing day and night temps, due to these very low temps my electric heater in my polytunnel struggled to keep the minimum temperature inside of the polytunnel at 5c /41F and instead the air temperature inside my polytunnel stayed around  2-3c / 35-36F  for most of the two weeks of very cold weather we had in December, on a positive note the temperature kept above freezing in my polytunel and the majority of my plants seem to have come through pretty much O.K except for one of my smaller Matucanas, a Matucana Madisonorum.

After the icy cold weather I checked over all of my cacti, and I noticed yellowish orange patches had appeared on top of my smallest Matucana madisonorum, at first I thought it was a fungus, the most common one being Rust Fungus and I decided to bring it inside the house and isolate it and treat it with a systemic fungicide spray, but after checking out a few cactus groups on Facebook I realised that there were quite a few other growers also experiencing this on their Matucana cacti too, especially Matucana madisonorum, many of these growers had grown these plants for years and just like me this was the first year they had encountered these strange yellow/ orange patches on their Matucana, my Friend Ziggy on You Tube also had exactly the same thing happen on his Matucana madisonorum too, so now we all know that its was due to cold damage and what caused the cold damage was the temperatures dropping too low for this particular type of Cactus. 

cold damage on cactus, Matucana cold damage
These unsightly yellow /orange markings appeared on my Matucana madisonorum Cactus during the very cold freeze in U.K and Ireland During December 2022.

How to treat 

As soon as you notice this type of cold damage on your Matucana cactus move it inside to a warmer position straight away, a bright position in a room with a temperature above 10c /50F is best, because this is due to cold damage it will not spread to your other plants, but if you are not 100% sure that what your cactus has is due to this cold damage then it may be best to isolate it from your other plants, there is nothing you can use to get rid of the yellow /orange marks, but moving the cactus into a warm room or position will help to heal up the markings and the good news is this unsightly looking yellow/orange blotching is only on the epidermis of the cactus skin and is more of an aesthetic problem and should not infect the inside of the cactus, the yellow /orange blotches will eventually go white and in time the cactus should make a great recovery.

How to Prevent 

The best way to prevent this from happening again to your Matucana cactus is to overwinter it at a winter temperature ideally no lower than  8-10 c / 48-50F, if your greenhouse /polytunnel is unheated then its best to bring inside your Matucana if colder than average winter weather is predicted.

The majority of my Cacti including my Matucana seem to overwinter perfectly fine if kept at an absolute minimum temperature of 5c /41F and kept totally dry all through the Winter, but this Winter was an exception due to the extra cold temperatures we experienced, all my other Matucana seem to have got through the cold weather all safe, but they are a lot more mature ( 15 -20 years old ) the little one that got cold damage was around 5 years old.

I have made a video on my Cactus and Succulent You Tube Channel called Desert Plants of Avalon showing you what Cold Damage looks like on Matucana Cacti and you can watch this video Below:

 

For lots of Tips and Tricks on growing Cacti and Succulents please check out my You Tube Channel called Desert Plants of Avalon and don’t forget to Subscribe.

 

 

 

 

 

Trichocereus, Trichocereus cacti, Trichocereus UK

Cactocereus.co.uk the awesome online shop ‘For Crazy Cactus People’

Hi Guys 😀 

In this months article I will be talking about the most incredible online cactus shop for all of us crazy cactus people called Cactocereus.co.uk ( Cactocereus.co.uk )

Trichocereus for sale, Trichocereus cacti, Trichocereus, San pedro cactus, San pedro cactus for sale,
Cactocereus.co.uk the awesome online shop for Crazy Cactus People.

Cactocereus.co.uk is an online Cactus shop for Crazy Cactus People that is run by a wonderful gentleman called Byron who is passionate about growing cacti and has over 6,000 cactus plants WOW.

Byron has a really incredible selection of extra special Trichocereus and Lophophora cacti as well as amazing large cuttings and cactus seeds of Trichocereus and Lophophora for sale, and if you love these extra special cacti as much as I do then you have to check out Cactocereus.co.uk ( Cactocereus.co.uk. )

Byron is a professional plant supplier and issues plant passports with each sale, which is a new UK legal agreement for long distance sales.

The fantastic news is that for all my readers and for my followers on my You Tube Channel called Desert Plants of Avalon there is a 10% off Coupon for my followers who purchase from Cactocereus.co.uk: please mention ‘PlantsOfAvalon’ and the 10% off will be applied at Checkout.

Trichocereus for sale, Trichocereus cuttings, Trichocereus cacti, Trichocereus cactus,
Cactocereus.co.uk have an amazing selection of many hard to find for sale Trichocereus including awesome Trichocereus cuts.

As well as their website Cactocereus.co.uk also have a wonderful Facebook page where you can like and follow their page here is the link to their Facebook page: https://www.facebook.com/TrichocereusUK

I was very lucky to have been sent an awesome box of Cacti from Cactocereus.co.uk to unbox and review and all I can say is WOWSERS haha, I unboxed two GORGEOUS big chunky Cuts of Trichocereus peruviana and Trichocereus pachanoi and a stunning Trichocereus scopulicola and a beautiful Lophophora williamsii Seedling and all the Cacti were truly incredible healthy specimens and all arrived very well packed and in perfect condition, I can highly recommend Cactocereus.co.uk to you all. 

Trichocereus, Trichocereus cacti, Trichocereus UK
Me very happy with my gorgeous new Cacti from Cactocereus.co.uk, two big chunky cuts of Trichocereus peruviana and pachanoi and a gorgeous Trichocereus scopulicola and Lophophora williamsii seedling.

I have made an unboxing video for my You Tube Channel called Desert Plants of Avalon where I unbox the incredible Cacti I received from Cactocereus.co.uk, I really was like a big kid at Cactus Christmas haha, you can watch this video below:

Sending all your Crazy Cactus People love and happiness and PLANT POWER from across the Emerald Isle.

 

 

 

How To Prepare for Cactus Winter Care and Dormancy

Hi Guys,

welcome to this months Article that is all about How to prepare your Cactus plants for their Winter rest.

If you live in the Northern Hemisphere like I do then its that time of year again when the growing Season is coming to a close and we have to think about the Winter plans for overwintering our cactus plants.

If you live in the Sothern Hemisphere like Australia then you are now into your Spring ( lucky you haha ) and you will be all set for the upcoming growing season ahead, but if you are like me and live in the Northern hemisphere  and in Spring and Summer and early Autumn you grow your cacti either outdoors in your garden or balcony or in a greenhouse or polytunnel, then during the Winter months you will need to protect any of your cacti that can not tolerate the cold temperatures and rainfall that we get here on this side of the planet.

The Weather
Don’t let your Cactus turn into a Snowman this Winter haha. Make sure you start overwintering your cacti NOW before the frost arrives.

What Cactus/Cacti do you grow and where? this is very important on how low the temperature can go for them in Winter.

There are so many different varieties of cacti and they all vary so much in their minimum Winter temperatures, because of this it is very important to know what type of cactus/cacti you are growing, the minimum temperatures cacti can tolerate in winter can vary so much depending on where they are growing, for example cacti that are being overwintered cool and dry in a dry arid desert climate with low humidity can survive much lower temperatures in winter than cacti that are being overwintered in a climate that is rainy and high in humidity in Winter, such as where I live here in Ireland and UK.

It is the high humidity that can cause the biggest problem in winter for cacti, my climate in Northern Ireland is mild temperature wise in winter and we rarely have a deep frost, but the air humidity is nearly always around 80% and high humidity and cold is not good for cacti.

There are some extremely cold hardy Opuntia cacti such as Opuntia humifusa that can tolerate being covered in freezing Snow if the overall air humidity around them is dry.

Opuntia variety happily surviving covered in heavy snow in Winter BUT the air humidity is also low.

If you are not sure what types of cactus/ cacti you grow then there is a very good website for cactus identification called CactiGuide.com as well as a plant ID App called PlantSnap but if you are still unsure of the type of cactus you are growing then its best to stay on the safe side and overwinter your cactus/cacti at a minimum winter temperature of 10c /50F as this is a safe all round temperature for nearly all of the cacti varieties.

What is the best temperature to overwinter Cacti ? and do they need Sunlight during Winter ? 

Most of the Cacti like to be overwintered cool and dry ideally at a temperature between 5 – 10 Celsius /  41 -50 Fahrenheit, this encourages them to stop growing and they get to rest over the winter and also encourages blooming in the Spring and Summer of the following year, light is not such a necessity during the Winter as the cacti will not be growing and only resting, and you can overwinter cacti in a sunless unheated room, some growers including myself like to use additional grow lights in the winter for their cacti, especially for any cactus seedlings they are growing, light is still important for young cactus seedlings as cactus seedlings will need to continue to grow during winter, however light is definitely not a necessity for the mature cacti, because mature cacti are not growing during the winter, and I personally know many growers who overwinter their cacti in garages and cellars, and as long as they re introduce their cacti slowly to the light in the spring, ( e.g by protecting them with shade cloth for the first few days to acclimatise them to the higher light levels of Spring ) they have great success with overwintering their cacti this way and still manage to get a wonderful display of blooms in the Spring and Summer on their cacti. 

Rebutia perplexa, Rebutia perplexa flowers
Many Cacti will produce blooms in the Spring and Summer if given a cool and dry rest period in Winter. (Cactus above is my Rebutia perplexa )

Cactus dormancy

Cacti dormancy is triggered by the shorter day length and also the drop in temperatures, because cacti naturally slow down their growth as the days get shorter and the nights get colder as the Winter approaches, its important to stop watering your desert cacti well in advance as dormant desert cacti will not need water during the winter.

What about the Christmas & Thanksgiving Cactus or any Winter blooming Epiphytic cacti ?

the reason why I say desert and not all cacti is because there are some cacti like the Schlumbergera ( Christmas and Thanksgiving cactus ) and some of the Rhipsalis Epiphytic cacti that will still need to be lightly watered during the Winter as they are Winter flowering, there are also certain cacti like Uebelmannia and Melocactus that dont like to be kept totally dry over the whole of the winter and appreciate a light watering once every 4-6 weeks in Winter, these types of cacti also need more warmth in Winter than the other cacti do, and need a minimum winter temperature of 10c / 50F. It really helps if you know the type of cactus you have, and if you are unsure what type of cactus you have then as previously mentioned do check out CactiGuide.com to help with ID, there are also apps to help with cactus identification such as PlantSnap.

Stop Watering your desert cacti NOW! 

I stop watering all of my cacti except my Epiphytic cacti from mid to late September, this is to allow plenty of time for the soil in their pots to totally dry out before the Winter approaches, the larger the pot the earlier you should stop watering, as cacti in large pots with lots of soil will hold on to more moisture in their soil, it really is important that the soil in their pots is dried out before the night temperatures get to low, If you have your cacti in a greenhouse or polytunnel or a covered balcony etc then stopping watering from late Summer early Autumn is the first thing to do to get your cacti prepared for the Winter, but if you have your cacti outside in the open in the garden then you need to move your plants to a covered position to keep the rain off them, by the time you bring your plants inside the house or greenhouse to overwinter the soil should have dried out, if you still have damp soil in pots you can use a few sheets of absorbent kitchen roll or newspaper tucked underneath the drainage holes of the pots to encourage the soil in the pots to dry out faster. 

When do I bring my cacti inside for Winter ?

Its important to bring your cacti inside before the chance of any night frosts are forecast, this can depend on the country you live in, here in Ireland and the U.K we don’t usually need to worry about frost until late October / November time.

If you are overwintering your cacti inside the house then a cool and dry unheated room ideally no warmer than 15c / 60F is best, any warmer than this can prevent your cactus from going dormant and you can have issues like etiolation ( stretched out growth ), If you are not able to overwinter your cacti in an unheated room and can only overwinter them in your living room, bedroom or kitchen etc, then I would still keep them as dry as possible and only water them if they show signs of excess shrivelling, keeping them dry may not prevent them from going into a proper dormancy if the room temperature is warm but it will still help to prevent them from growing stretched out.

During the Autumn and Winter months I heat my polytunnel at a minimum Winter temperature of 5 Celsius / 41 Fahrenheit and I have a thermostat control that switches on if the temperature drops below 5 c / 41f inside the polytunnel, I also use a dehumidifier that is especially for cold and damp environments like greenhouse, polytunnels, garages, cellars etc, I use the dehumidifier on the wet and windy days to keep the humidity no higher than 50% inside the polytunnel, on the dry winter days I will open up the door in the polytunnel to allow plenty of air circulation as air circulation is important if you have your plants in a closed environment and the temperatures are cool, with the heater and the dehumidifier this allows me to keep a large proportion of my cacti safe over the Winter to overwinter them during their Winter rest period, but also still warm enough for the winter growing cacti such as  the Schlumbergera cacti commonly known as the Thanksgiving and Christmas cacti that still continue to grow and flower during the Winter.

Schlumbergera buckleyi in flower, Christmas Cactus in flower
Some of the Epiphytic Cacti varieties such as Schlumbergera (Christmas & Thanksgiving Cactus) and Rhipsalis will bloom during the Winter months when all the other Desert Cacti are having their overwintering rest, its important that you still continue to keep these Epiphytic cacti watered over the Winter.

I hope you found this Cactus Winter Preparation Article helpful, and for an in depth video on How to Overwinter Cacti and Succulents then do check out the video I have made on my You Tube Channel called Desert Plants of Avalon on How To Overwinter Cacti and Succulents, and you can watch this video below: 

If you want to know what heater I use for heating my Greenhouse/ Polytunnel then do check out this video I have made for my You Tube Channel called Desert Plants of Avalon on How I heat my Polytunnel Greenhouse in Winter, and you can watch this video below:

If you want to know what dehumidifier I use to keep the air inside my Greenhouse /Polytunnel dry in Winter, then check out this video I have made for my You Tube Channel called Desert Plants of Avalon, on installing the dehumidifier and you can watch this video below:

If you want to see my complete Greenhouse/ Polytunnel set up then check out this video I have made for my You Tube Channel called Desert Plants of Avalon on my Cacti & Succulent Polytunnel set up and you can watch this video below: 

Thank you so much for reading and for lots more tips and tricks on growing Cacti and Succulents check out my You tube Channel Desert Plants of Avalon and don’t forget to Subscribe <3