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There is a lot of discussion on what to do during our winters here in the Valley. There are always the questions of what to do to protect your trees what needs to be covered, when it should be covered, how long to keep it covered, and what to cover it with.

Items that are the most susceptible to being damaged by cold weather are going to be extremely tropical plants, plants that are not used to seeing the temperatures fall below the 40s. You will always run the risk of any tree being damaged however depending on how long it is below freezing and cold it gets, even desert acclimated plants can be damaged if it is cold enough.

You only want to cover your plants on nights that are predicted to be in the freezing zone, you do not want to cover them to early because you want the plant to be able to harden up naturally, and covering it when it’s not necessary can actually make the plant more dependent on the warmth than what may be necessary. If the night is predicted to be cold, wait as long as you can before you cover it, typically later in the night (8-9pm). You want to leave the plant covered until the sun has started to come up; do not leave it covered while the sun is up this can lead to more damage to your plants and trees.

Many people think that covering your plant is the only way to protect it from frost damage; this is not true, there are many other effective means of doing this. One option other than covering is creating a micro-climate in yard. By watering very heavy the night of the free, to the point where you have standing water on the ground, this will create humidity preventing frost from settling on the plants or trees as much.

Homeowners can also use flood lights and clamp lights as an effective way of protecting a tree from frost damage. By putting the lights focused onto the tree it will create heat that will not allow for frost to form. Other effective means of frost protection are using the old style Christmas lights (NOT LEDs) and wrapping your trees and bushes, this can create just enough heat to protect your plants and trees while adding a splash of holiday color to your yard. You can use large osculating fans to help move the air in your yard, simulating wind blowing makes it more difficult for frost to settle. Patio propane heaters are effective if you have a sensitive plant or tree, place the heater near the plant and let it run on low creating just enough warmth to keep the plant safe.

Very rarely do we get temperatures in the valley that will be detrimental to our landscape, but knowing what to do during these few times will keep your landscape looking great throughout the winter and ultimately save you money. Remember if you choose to cover your plants only use burlap or cotton, NEVER USE PLASTIC! Follow these simple tips and keep your landscape green!


 


Comments

Valerie
12/31/2012 09:20

Thank you for this post. However, could you please let us know which of the plants need to be covered? Or perhaps a shorter list of those that don't? I have fruit and citrus, and I remember when they were planted I was told that for it was better (for some or all, I don't remember) if they DO get frost, because it creates a more abundant crop in the Spring. Have Museum Palo Verde and Jacaranda as well. Thank you.

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Moon Valley Nurseries
01/10/2013 15:12

I would cover pretty much everything with this upcoming freeze Valerie as it is going to be incredibly cold the next few days. The only things that may not need covering are going to be desert trees such as the Palo Verdes. The Jacaranda's I would take measures to protect them like the ones in the article.

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Erich
01/10/2013 14:17

We are new to AZ. you planted a few trees and cactus for us.
We do have a big grapefruit tree full of fruit. should we pick the
fruit before the frost??

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Moon Valley Nurseries
01/10/2013 15:10

I would recommend picking all the fruit off of your tree before it gets cold. Once the fruit freezes it is no longer usable. Also be sure to cover your trees and plants as well.

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Terry Teal
01/11/2013 04:10

Just want to thank you for your professional information and I had no idea we were to uncover during the day. Keep up the good work and healthy plants.

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Moon Valley Nurseries
01/11/2013 09:45

Terry we are always happy to help. One thing to keep in mind though is not to remove the cover until we are out of the frost zone. If you are unable to get them uncovered for a couple of days it is best to leave them covered then to not cover them at all.

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Rick and Laura Elliott
01/11/2013 19:08

We have four beautiful 11' Indian Laurel trees that we purchased from you guys in April, 2012. We have frost cloths covering the tops, sheets wrapped around the trucks, incandescent christmas lights and some insulated cloth around the base. We also have the irrigation on drip. Is this enough? I love my ficus!!!! :)

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Moon Valley Nurseries
02/22/2013 06:44

With this tough winter we have experience Rick and Laura it is hard to say if it was enough or not. If you have any problems with the trees now bring some photos into the nursery and we will be happy to help.

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Leslie Forshee
01/15/2013 08:44

We have 4 sisso trees out back, they are about 2 years old...we did not cover them and the leaves are now brown from the last few nights of hard freeze. Do the brown leaves mean they are dead or will not survive?
Thanks for your help!

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Moon Valley Nursery
02/22/2013 06:45

The leaves being brown are not a sign the tree is dead but rather the foliage. Without seeing the tree it is hard to say whether or not it is alive. Sissoo trees are pretty hardy and in most cases can rebound. Start fertilizing now for your best results.

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SD Brown
01/18/2013 11:49

Two ficus trees that were purchased/installed by Moon Valley in 1998 were heavily damaged in the recent hard freeze. How much and how often should I water and apply the super moon juice to encourage a recovery? If new growth shows up, when should the damaged areas be removed? These trees are 20 + feet tall and would hate to lose them now.

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Moon Valley Nurseries
02/22/2013 06:47

Mr Brown, right now only water about once a week, a good deep soak. Also using the Super Charged Moon Juice weekly is going to be best. You want to start trimming in March, getting ride of the areas that are dead.

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William Colfelt
01/19/2013 18:20

We purchased a Jacaranda tree from you a couple of years ago. It is too tall to cover, but we protected the base of the tree. The branches are now all brown and will probably fall off. Does this mean that it is dead or will it come back? Thanks.

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Moon Valley Nurseries
02/22/2013 06:48

William, without actually seeing the tree it is to hard to say. Could you take some photos and bring them in? We would be happy to help you asses the damage.

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02/11/2013 01:49

Took me time to go through every one of the comments, but I truly enjoyed the article. It proved to get quite helpful to me and that i am certain to each of the commenters here! It is always great whenever you can not merely be informed, but also entertained! Cheers!

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Lynn Grossman
02/18/2013 14:45

Moon Valley just landscaped my entire backyard to zero scape landscaping. I covered most of the plants but now it needs to be cut back and the dead portions cut away. Is it too soon to do this and also do you provide this service for the area you just landscaped

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Moon Valley Nurseries
02/22/2013 06:49

Lynn, it is a bit to soon to be trimming anything away as it can still get cold in the next week or so. Typically in the first couple of weeks of March is when you want to trim. We do not have a trimming service, but if you give us a call we would be happy to recommend one close to you. Thank you.

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03/27/2013 01:36

The post about how to protect your plants and trees in the yard from frost and extreme climate was very useful and helping. The techniques you have given are easy and cost efficient like watering the trees in the night and giving them heat using floodlights. Thanks for the great info.

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