Without protection.....they will become deer food. You just put up a sign that said......"Free snack right here!" Yes the light and the like can only help them grow more.....but while they are in reach of the deer.....they will struggle. If you want them to turn into something - cage or tube them. By just removing the grass/weeds.....you simply traded one "evil" for another in my opinion.
The world is full of little critters with teeth. If your going to go to the hassel of "releasing" these little trees, take the time and put some cages of hardware cloth around them and some cheap rebar or the like to protect and mark them. Not sure why but it seems like mother nature likes to eat the things we don't want them to......In my area, deer numbers are so low and they tend to not winter here so I don't have that much trouble with them, yet. When they catch on it may be a problem. Hares are worse here. I do see some issues when I cut ash near seedlings. The deer home in on ash suckers here.
The world is full of little critters with teeth. If your going to go to the hassel of "releasing" these little trees, take the time and put some cages of hardware cloth around them and some cheap rebar or the like to protect and mark them. Not sure why but it seems like mother nature likes to eat the things we don't want them to......
I have few deer as well, and yet I had one remove an actual cage from a 6' chestnut tree of mine and then eat every leaf and soft stem and then rub the snot out of it...... I had to start over with a 12" stick and 2 small buds, this spring.
Then it simply isn't practical to cage that many.....I had no idea you had that many. I would try to find a way to mark the location and see how things go. I would leave some in the weeds and some exposed and see which ends up doing the best in the long run. You don;t know until you try.I have 50 caged but I have 1000+ trees.
By low deer numbers, I mean 5 sq mile or less.
Seedlings in wooded shade struggle, seedlings in tall grass not so much because there's always some sunshine filtering through the grass. The sod helps preserve moisture, and you usually don't see dead seedlings in tall grass like you do in dense wooded shade. I'd've just left them keep growing several more years until they outgrow the grass.
Any concerns or issues with the bucks rubbing up those young oaks once the cage comes off? A 12' oak is still only 3-5" in diameter.I try to cage a few more small oaks each year, when I like where the squirrel planted it. When they are small rabbits are the problem, then deer from browsing and rubbing. It takes a deer less than 10 seconds to wipe out two years of growth. The key is to protect the central leader from any damage. I've been using 5ft cages with T posts. I have a few oaks now bove 12ft that I can start removing cages to put on other seedlings. Maintenance during the summer is removing virginia creeper, grapevines, from cages, and giving them space from unwanted trees (buckthorn, elm, box elder). Late fall I'll trim lower branches so more energy goes into vertical growth.
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The part of i enjoyed about this discussion is the diversity of growing areas; what works great in one area may not in others. And there has been plenty of ideas I have taken and implemented at my place.
The deer don't seem to bother them as much, but as soon as I try to give them some help.....the deer will eat or rub them to death.
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I figure they do it for spite.....they are like, "Oh, mr person likes this, so I'm going to "F" it up!" I have told this story so many times, I am not sure who has all heard it, but I had a deer remove the cage and reduce a 6+foot chestnut tree to tattered stick. Before. What they didn't eat they rubbed. When I cut back all the dead to try to get it to recover I had about 18" of stick with 2 buds on it. #$%@ Deer!I have seen them do the same thing. Last year, i had a couple of SWO doing really well uncaged. I figured they needed more light so I cut some firs in the way. The next day I saw they were clipped. I caged them quick.
It is like they follow me around and check for opportunities.