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paul444444

Cedars thinning

6 years ago

Hi. I am having problems with my cedars thinning. I live in Saskatchewan, Canada where we have long cold winters and spring is only just starting now. I have no idea how old they cedars are but they were large when we bought the house 6 years ago. They act as a privacy screen so I really want to get them healthy again.
It all started last year, when they had dropped a lot of needles at the end of winter beginning of spring. At the beginning of spring our arborist said to feed them now and water regularly, which I did all year but they don't seem to have improved. The cedar on the right in the first picture is the worst, with the other 10 looking like the one on the left. The one on the right is a different cedar to the others, a white cedar I think, that they must have put in by mistake years ago. It does seem to be putting some growth on in the bare patch from the trunk.
I bought a sprinkler hose which I put under the cedars and turned on every 2 days for an hour, 24 hours later the ground feels wet as far as I can put my fingers in. The hose is a sprinkler on the top and soaker underneath. I have this running directly under the cedars, should it be more at the edge on the drip line?. Do you think this is sufficient water?
There is now a lot of dead leaf matter on the ground, should I remove it (I did last year)?. I've read I could mulch but I'm not sure what with, is it worth top dressing with compost?
I've also read I could sheer to encourage bushing but some people say spring, some say early summer and some say both. What is the best way, how much and when?
I really want to do whatever I can to save these guys and would really appreciate any help.
Thanks in advance
Paul

Comments (15)

  • 6 years ago


    Photo 1

  • 6 years ago


    Photo 2

  • 6 years ago

    Cedars will thin pretty quickly in shade/partial shade...the Russian Olive isn’t helping.

  • 6 years ago

    our arborist said to feed them now and water regularly, which I did all year but they don't seem to have improved.


    ==>>> things happen in tree time with the trees ... which is counted in decades ... i am not surprised you havent seen any change ... or apparent change ....


    i dont believe in fert'ing trees ... i think its a waste of money ... and im not to impressed with a pro who suggests such ...


    these trees are stressed,. not hungry ... and the stresses have been noted above ... lack of full sun.. and probably water competition ... i agree on removing the tree .. if you the best odds of saving these ... and since the tree is competing for water ... i dont see any downside to giving them such ...


    perhaps others can chime in .. if you take the tree out.. might the plants get sunburned ... so is timing of the tree removal important ... before the tree leafs out and before the plants start active growth this spring.. or wait until fall as the sun declines for winter ...


    ken



  • 6 years ago

    Thanks for the replies. The tree has been there for longer than the cedars. It is regularly prunes to maintain otsits shape and size, so the environment for the cedars shouldn't have changed much. Also this is our 'mock' apple tree that fertilizes our apple so it has to stay. Any other advice would be appreciated. Other cedars in the neighbourhood look similar so maybe it was an environmental problem.

  • 6 years ago

    Thanks, this agrees with what iI have previously read. When would be the best time for me to shear here. The temp is above 10 celcius on the day but can still drop below 0 overnight. Also how much do I take off?. Thanks again

  • 6 years ago

    I can't tell you that for sure. Your climate is very different from mine :-)) Is forsythia or the spring bulbs blooming there yet? That would be a good marker.

    And I would shear quite lightly. You do not need to take much off to encourage denser regrowth....about 1/2 inch or so should do it.

  • 6 years ago

    I'm not sure as we don't have early spring bulbs but I doubt it as nothing is even out of the ground.

  • 6 years ago

    Any spring blooming trees showing color? Or maybe I should ask you what signs of spring can you see :-)

  • 6 years ago

    The snow just melted :-). There are no leaves in any trees but the apple, lilac and plum are all just starting to bud. Out last frost date is May 24 so I am just worried a frost will burn them if I do it too soon. Thanks again for your help

  • 6 years ago

    Arborvitaes are pretty much frost proof :-) But you do want to wait until the trees come out of dormancy otherwise the shearing won't achieve the desired result. Maybe wait until the first of the month? Or just keep checking until you see other clear signs of spring growth going on.

  • 6 years ago

    Thanks. One of our first plants to bloom is an allium. It is something like ivory queen we think, we inherited most of these plants. It is just coming out of the ground.

  • 6 years ago

    Not sure how you see arb needles on the ground, could they be bits of branches? If so, squirrels here ravaged a neighbor’s arb here this winter to where it looks like yours and a large area beneath it looks like it was mulched with branch bits.

    tj

  • 6 years ago

    I am not sure what you mean, I am referring to the brown needles that have fallen off the tree to the ground

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