Sylvestris needle problem?

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Sylvestris needle problem?

Post  Nik Rozman on Sat Jan 07, 2012 7:55 pm

Hi everyone.
I think I have a problem with one of my sylvestris pine. The needels have turned quite yellow (not brown - so it's not dying...for now). Would anyone know what is the cause of the change in collor. Does the tree need more iron in the fertiliser maby? Or is it just because of winter time here in our region?

Thanks for your replys.

Nik Rozman
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Re: Sylvestris needle problem?

Post  Loke Emil on Sat Jan 07, 2012 8:47 pm

Hi Nik

I would hesitate giving any advise without knowing about how the tree was treated, trained, watered, pruned etc this season. Hence the following questions concerning your tree:

Are the new buds bright in color at the moment?
Do you keep the soil on the moist side of dry at the moment?
Does all of the root system get enough air?
Did you prune back hard or wire shape any larger parts of the tree earlier in this season?

I hope your Sylvester will be well.

BR / Loke Emil

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Re: Sylvestris needle problem?

Post  Nik Rozman on Sat Jan 07, 2012 9:00 pm

Loke Emil wrote:Are the new buds bright in color at the moment?
Do you keep the soil on the moist side of dry at the moment?
Does all of the root system get enough air?
Did you prune back hard or wire shape any larger parts of the tree earlier in this season?
The buds look normal.
The tree is outside so now in winter the soil doesn't dry out that much. But the soil is pure pumice, so that shouldn't be a problem.
I styled the tree a year ago.

Besides that the tree has been ragularly fed and watered the past year just as all of my other trees.

Nik Rozman
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Re: Sylvestris needle problem?

Post  marcus watts on Sat Jan 07, 2012 9:19 pm

if it is all the older needles behind the newer ones this is normal, are the new (this years) needles still green or have they gone yellow as well? Normally one and two year old needles stay green and 3 year old ones go yellow and eventually drop of. If the whole tree is yellow the roots are too wet - pumice does hold onto lots of water in all the small holes in the structure, it only allow excess water to drain out once it is fully waterlogged - and with constant wet in the winter but no water being used by the tree it could be much to wet for the roots.

I'd dry the tree out and then put a cover over the soil so it stays much drier. Normally feed and nutrient deficiencies are the very last thing that effects a pine needle colour - water, soil and roots are the culprit most of the time

hope this may help a little

marcus

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Re: Sylvestris needle problem?

Post  Nik Rozman on Sat Jan 07, 2012 9:59 pm

Thanks Marcus.

Btw. all the needles got yellow.

Nik Rozman
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Re: Sylvestris needle problem?

Post  landerloos on Sat Jan 07, 2012 10:38 pm

Hi Nik, you said 100% bims, could be its not getting nutrients enough like iron, bims doesnt retain much fertilizer.
But anyway check the roots out, Like Marcus said it could be a root problem.

Peter

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Re: Sylvestris needle problem?

Post  paulf on Mon Jan 09, 2012 11:04 pm

Nik,

I found with my scots pines that in a very mild winter like this one they still need quite a lot of feeding and watering - the big scots will dry out its pot still. mine are in biosorb and a bit of pine bark. im still watering daily on sunny days and giving food weekly.

Durign the summer my needles were very dark green and i had a lot of backbudding. when i slowed down the feeding in autumn some of them lost needle color - so i upped the feedign and brought them in under glass - now they are good again.

Im using fish emulsion once a month and canna terra vega for the other feeding times.

if your pots allow to be lifted out without desturbing the roots then maybe lift them out and check the rootball.

P

paulf
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