How to remove algae from mature bark?

I collected this little yamadori hawthorn early this year and at the time it had lovely silver bark. Now its turned green and I am worried that if I try to clean it off, I will damage the mature bark platlets. Any ideas?
Thanks, Lee.

Some people spray with dilute vinegar. Best solution, give it more sun.
Iris

Agree with Iris. Also, water the roots, not the tree. That's likely moss, not algae.

Yeah, vinegar brushed on, and then let sit in the sun will do the trick. May need to be repeated.

Does this hawthorn have his own thread?

If not, please create one. I would like to see the entire tree.

Thanks for the replies. Its been pretty dull and damp here this year, so no surprise.

Rui Marques wrote:Does this hawthorn have his own thread?

If not, please create one. I would like to see the entire tree.

Thanks for the interest Rui. Its a nice bit of material, but I don't think its really worthy of its own thread yet though.

hi,
i know we've had a very wet year but your soil is staying way too wet and soggy - all the liverwort on the surface shows very poor drainage and equally poor aeration. This will be making a very humid atmosphere around the tree, hence the green trunk - chances are root growth will currently be poor below the surface too - liverwort is the instant obvious indicator to bad pot conditions.

sorting the symptoms will make life easier - better pot, more exposure to sun, better soil & thetree will not go so green - dilute lime sulphar spray will kill off the trunk algae too, and bring back a silver look.

cheers Marcus

Marcus, I'm going to spray a 20% LS solution on my trees before putting them away. I've never used LS like this before, so I'm asking, will this turn my deep dark brown bark on a JBP silver? If so, does the dark color return by spring?

Fore wrote:Marcus, I'm going to spray a 20% LS solution on my trees before putting them away. I've never used LS like this before, so I'm asking, will this turn my deep dark brown bark on a JBP silver? If so, does the dark color return by spring?

Hi - use a weaker solution for winter spraying - 30:1 is plenty (5:1 will whiten the tree quite considerably). Totally cover the soil before starting and dont get any on evergreen foliage at all - i only use ls spray on my deciduous trees to be honest so i'm not to sure about pines & junipers - go very carefull

cheers Marcus

Lee Brindley wrote: Its a nice bit of material, but I don't think its really worthy of its own thread yet though

I think it's worthy !!