Bulbs Flower Basics Flower Beds & Specialty Gardens Flower Garden Garden Furniture Garden Gnomes Garden Seeds Garden Sheds Garden Statues Garden Tools & Supplies Gardening Basics Green & Organic Groundcovers & Vines Growing Annuals Growing Basil Growing Beans Growing Berries Growing Blueberries Growing Cactus Growing Corn Growing Cotton Growing Edibles Growing Flowers Growing Garlic Growing Grapes Growing Grass Growing Herbs Growing Jasmine Growing Mint Growing Mushrooms Orchids Growing Peanuts Growing Perennials Growing Plants Growing Rosemary Growing Roses Growing Strawberries Growing Sunflowers Growing Thyme Growing Tomatoes Growing Tulips Growing Vegetables Herb Basics Herb Garden Indoor Growing Landscaping Basics Landscaping Patios Landscaping Plants Landscaping Shrubs Landscaping Trees Landscaping Walks & Pathways Lawn Basics Lawn Maintenance Lawn Mowers Lawn Ornaments Lawn Planting Lawn Tools Outdoor Growing Overall Landscape Planning Pests, Weeds & Problems Plant Basics Rock Garden Rose Garden Shrubs Soil Specialty Gardens Trees Vegetable Garden Yard Maintenance

Cactus Damage at Freezing Temperatures

How to Start Lemon Seeds Indoors - watch on youtube
Cactus Damage at Freezing Temperatures

Cactus Damage at Freezing Temperatures. Cacti are part of the succulent group of plants, known for their ability to survive in dry, desert climates by retaining large amounts of water throughout the growing season. Their proclivity for hot climates makes succulent plants choice for gardeners living in particularly hot climates; it also makes them...

Cacti are part of the succulent group of plants, known for their ability to survive in dry, desert climates by retaining large amounts of water throughout the growing season. Their proclivity for hot climates makes succulent plants choice for gardeners living in particularly hot climates; it also makes them susceptible to damage from low temperatures. Frost damage on cacti can be an eyesore at best and can threaten the health or your cacti at worst, so learning the signs of frost damage as well as how to protect the cacti from frost damage is an essential part of growing cacti successfully.
Symptoms
Each of the many species of cactus varies in its susceptibility to winter injury. Nearly all cacti, however, are intolerant of temperatures below freezing. If your cacti have been subjected to below-freezing temperatures, the earliest symptoms will show on new growth tips. The exact appearance of the symptoms of winter injury vary from species to species, so if you see strange growth symptoms immediately following cold weather and that cannot be associated with any other possible ailments, the cause may be winter injury. To confirm the diagnosis, send a tissue sample to a university extension office and have it diagnose possible winter injury.
Other Problems
The biggest problem with frost-damaged cactus is not the damage itself but that the damage can leave the cactus susceptible to other, more serious ailments. Bacterial and fungal rot diseases develop from various kinds of damage including insect and frost damage. Bacterial soft rot, for example, causes spots of necrotic tissue that appear soft and dark. Control measures usually involve pruning off the diseased tissue with sterilized pruning equipment to prevent the rot from spreading to the other parts of the cactus. Rot diseases can threaten the long-term health of a cactus if they are not properly managed, so protecting your cacti from winter damage is an important part of cactus cultivation.
Preventing Frost Damage
The best winter injury control measures are those that are preventive in nature. If you live in an area that sees freezing temperatures many times throughout the year, you may be spending more time treating winter injury than enjoying healthy cactus plants, so you may want to consider forgoing cactus for other plants. If you live in an area that is conducive to cactus growth, however, look for the most cold-tolerant varieties of cactus available for purchase and cultivate those in lieu of less cold-tolerant varieties. Avoid excessive fertilization and irrigation early in the growing season as these leave cacti more vulnerable to frost damage.
Protecting Cacti From Cold
Of course, if you are facing a hard freeze in the middle of the winter, you will need to take steps to protect the cacti from damage. Just before the freeze, cover the cacti with a frost blanket, sheet or other similar material; never water the cactus just before the freeze. During the daytime when temperatures have raised above freezing, the protective layers should be removed to ensure that the cacti can receive enough sunlight.

Check out these related posts