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Please help as my pine is going brown and I don't know why. No pests are on the pine and it has not dried out and I haven't over watered. Please help, I have attached some pics

Hi,

That does not look good. What have you done with the pine over the last 6 months? Repotted? Fertilizer? Wiring? ..?

Hi, I repotted last month and it was fine until now. This has happens in the space of a week

Something went wrong with repotting. You maybe cut too much of the roots off or have been keeping it too wet.

Pines and juniper stay green for a long time after they die. You are now seeing the effects of the repotting.

This happened to me with one of my Junipers!. Reason? I cut too many roots trying to get my shohin (which has quite a thick trunk for a shohin) on a small pot... Your tree doesn't look that bad, trust me I didn't think mine was going to make it... I put in on a shaded area, and kept pruning off branches that were dying and taking of any dead leaves, also I would mist it twice a day. My tree survived, it did lose some branches , but as soon as I saw it started growing again and look much more healthier (two weeks ago), I put very very little fish fertilizer mixed with water. Today the tree is green, healthy, beautiful and has a lot of new growth, so I am going to feed him as I do with my healthy trees now. Your tree looks better than mine did, take good care of it and good luck!!!!.

I did not cut any roots off as it was nursery stock and its in quite a large pot, not a bonsai pot. I simply took it out of its plastic pot and put it straight into the large ceramic pot keeping all of the original soil and its bacteria.

J.Swanny wrote: I did not cut any roots off as it was nursery stock and its in quite a large pot, not a bonsai pot. I simply took it out of its plastic pot and put it straight into the large ceramic pot keeping all of the original soil and its bacteria.

well this is not usually what we do when we re-pot... is there any particular reason why you did it this way?. You're suppose to cut about 1/3 of the roots, cutting specially the big ones to stimulate root growth close to the tree, and obtain a nice and dense root ball, take all the old soil out and replace it with quick draining bonsai soil mix. Unless you have any specific reason why you moved it to a bigger pot, and didn't change the soil.

Nursery stock usually has very inefficient root network for bonsai, and root pruning is necessary. So you didn't re-pot it, you actually transplanted it.

hmm.. odd. What sort of pot did the nursery have it in?

I had removed a lot of strong candles leaving the weaker candles and did not want to stress the tree more by removing roots aswell, I was going to leave the root pruning until August/September to let it recover first

eangola wrote: well this is not usually what we do when we re-pot...

If I got it right, some 9 hours ago you posted pictures of your very first juniper. I can see you have studied bonsai and you do have knowledge, however, I think it is safe to say you are inexperienced. Probably you should be a bit more careful trying to give advice.

You're suppose to cut about 1/3 of the roots
cutting specially the big ones to stimulate root growth close to the tree

I think you misinterpreted the rule that, when repotting, we should not remove more than 1/3 of the roots. That does not mean you MUST remove 1/3 of the roots. Whether you remove roots or not, and how much you remove, depends on the stage of the plant.

For example: I have a Ginkgo that I got for free. It has been neglected for years, with as a result that the roots have become extremely long, winding several times in the pot. There are fine feeder roots only at the end of the roots. Cutting 1/3 of the roots would mean taking a very big risk and probably killing the tree.

take all the old soil out and replace it with quick draining bonsai soil mix

That is not correct. For pines and junipers you do NOT replace all soil.