Needles of P.Omorika seedlings turning brown

liopleurodon(Z8)August 14, 2012

Hi,

I have a few P.Omorika seedlings which are about 3 months old.

Since a day or two, however, their needles, beginning from the youngest ones (those at the top) are turning brown. Is there any specific cause for this? Did they get too much/too few sunlight; was it possibly too hot where they stood, ...? I have a few P.Abies too in the same pot (so same conditions) and they're doing fine. I have them all planted in potting soil (if that's the correct word in English).

Can you give any tips to make my spruces "happy" again?

Thank you very much.

Here are some pictures of them:



Shot at 2012-08-14


Shot at 2012-08-14

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coniferjoy(z7 The Netherlands)

Liop, that's sun burning damage, it seems that they were standing in a hot place to long.
The only thing you can do is put them in a more shady place.
After doing this they will grow happily ever after...

    Bookmark   August 14, 2012 at 11:21AM
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sluice

Sometimes I'll see quite a bit of variation seen in plants growing in similar conditions, and it can be difficult to pinpoint the cause (or causes) of the problem.

I can't say what's going on with your spruce needles, although for seedling germination I would recommend something other than plain potting soil.

This mix drains quickly and allows air to get to the roots.

Perlite, scoria, turface, small bark fines, and a dash of potting soil. There are other variations on this theme.

Good luck!

    Bookmark   August 14, 2012 at 11:22AM
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ken_adrian Adrian MI cold Z5

i dont even think his is a mixed media.. it looks like straight peat ... they will soon need to be in a high drainage media ... similar to sluices.. or a cactus mix..

there is also Al gritty mix.. all over GW ... try the search function.. if no one else links you ...

i agree on sunburn ... or perhaps the dark peat overheated.. and heat burned them in sun ....

seedlings that size.. should probably be in very bright shade.. rather than sun ...

ken

    Bookmark   August 14, 2012 at 1:44PM
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ken_adrian Adrian MI cold Z5

if it is straight peat.. there may be pH issues ... though i have no idea on omorika ...

ken

    Bookmark   August 14, 2012 at 3:22PM
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liopleurodon(Z8)

Thanks for the answers.
They may indeed have burned a bit since it was very hot here the last days. I will try to put them in half-shade instead of full-sun.

I will also try to make a better drained soil. I presume it is also best to put the spruces in a pot with holes in it? The pot they're now in is fully closed.

The pH of the potting soil should be slightly acidic (according to the package).

Again thanks for the suggestions.

    Bookmark   August 15, 2012 at 7:18AM
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sluice

Yep, make sure the pot has holes in it.

Please keep us posted on their progress!

    Bookmark   August 16, 2012 at 12:19AM
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liopleurodon(Z8)

I took the advice and changed to pot they're in:
I made holes in it and placed it in the same kind of pot so it won't make our house wet when indoor.
I changed the soil with one made from gravel, pieces of bark and potting soil. The top consists of a small layer of potting soil with some gravel on it, just for aesthetics. :p

Here is a picture:

    Bookmark   August 19, 2012 at 7:55AM
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liopleurodon(Z8)

Update:
I just watered it and water came through the underside very fast. So I presume it drains now a lot faster than before. The water coming through the underside was quite dirty though (taking some potting soil with it), so I'll have to add potting soil quite regulary.

I've put them in full shade now because it's what they call the "hottest day of the year" today. Temps are going up to 35 degrees Celcius (95 degrees Fahrenheit) which is exceptionally hot for where I live.

    Bookmark   August 19, 2012 at 9:26AM
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