Keri-WMS's 6 year JBP entry thread

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85
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56
Location
S.E. UK
#1
Let's have a stab at this - southeast UK - seeds just bought:

dollar_seeds on eBay, two packets of 10-off Mikawa JBP
&
www.bonsaiplaza.com, two packets of ?-off Mikawa JBP
(also, if allowable)
treeseedonline.com from an order I did in April 2017, "5 grams" of leftover plain JBP seeds

Let's see how this turns out! :)
 
Last edited:
Messages
85
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56
Location
S.E. UK
#8
I really should update this, I've got photos on my phone I can upload....

I took seedling cuttings of roughly 1/3 of my "plain" JBP and 95% made it surprisingly (to me). However they, the other 2/3 of plain and especially the Mikawa types are all developing purple needles. I'm hoping it's just because the weather's getting colder but it's still disturbing, I quarantined the first ones to do it thinking it was a fungus caused by the mini greenhouses I've got them in!

Anyone else getting the same? It's the "older needles"....that are not THAT old, everything other than the freshest ones round the bud.
 

Fonz

Shohin
Messages
361
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551
Location
Pulderbos, Belgium
USDA Zone
8b
#9
Mine arte also geting purple needles, put a few under a growing light and their needles stayed green. It's a lack of sunlight thing….
 
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85
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56
Location
S.E. UK
#11
I've got two (older) ones indoors that never did it, the purple ones are outside - I was getting worried that my whole batch might have needle cast...

Yup, Hastings area on the coast, you probably drove past me! :p
 
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Location
Netherlands
#12
Mine arte also geting purple needles, put a few under a growing light and their needles stayed green. It's a lack of sunlight thing….
Mine are in full sun, well fed and still have that purple color. It's a reaction to cold; many green plants do it.
https://en.wikipedia.org/wiki/Anthocyanin shows that it can be a response to temperature stressors.
 
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Netherlands
#14
My red pines experiencing the same thing last year, turned back green just before spring. Some turned back green halfway through winter.
If you put the purple ones indoors, or at a higher temperature for a few days (or two weeks maybe) they should turn back green as well. If you spray them with 30% hydrochloric acid, they will turn completely vivid red. Don't do that, it's not good for them and they will certainly die. But it looks pretty.
The purple pigments are protecting molecules that prevent stress damage. They show up when temperatures rapidly decline or when plants are highly stressed from other factors (although in conifers that usually doesn't happen, herbs do it all the time).

It shouldn't be a big deal and it's a completely natural response. It differs a lot from plant to plant, I have jack pines that are both dark green as well as completely purple. Some of my black pines express the same thing. Scots pine doesn't do it in my backyard for some reason.
 
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132
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74
Location
Missouri
USDA Zone
6b
#15
I planted my seedlings pots in the ground maybe 2 weeks ago and the purple ones started to green up and they're even still growing. i saw a thread somewhere where someone had a 1 or 2 year jbp that turned completely brown then woke up in spring.
 

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