AusBonsai

Hi I'm just wondering where I would be able to source reliable seeds of acer palmatum. Also Acer Oliverianum seeds. If anyone has any contacts.

Andy

I usually supply Acer palmatum and Trident maple seeds each winter. Fresh seed grows better than stored seed.
Or you can get a head start and purchase some seedlings that are already 1 or 2 years old.

Can't help with Acer oliveranum though. I've never even heard the name???

shibui wrote: ↑June 14th, 2022, 6:10 pm I usually supply Acer palmatum and Trident maple seeds each winter. Fresh seed grows better than stored seed.
Or you can get a head start and purchase some seedlings that are already 1 or 2 years old.

Can't help with Acer oliveranum though. I've never even heard the name???

Do you find you need to stratify the seeds in the fridge to get them to germinate?

I've been reading a few different websites - some suggesting 10+ weeks in the fridge, others saying to just plant them.

As this is dependent on climate, it would be good to get your take on it - not sure of your climate exactly, but I'm in Melbourne if that helps.

Last time I planted Japanese Maple seeds, it was a while ago, probably in 2007.
They were off a freind of mine's tree. They were directly off the tree and had undergone natural stratification. Last year, I tried chinese elm, JBP and JWP after stratification in the fridge.
Not a single seed took root or grew a sapling.

SuperBonSaiyan wrote: ↑July 18th, 2022, 11:15 pm

shibui wrote: ↑June 14th, 2022, 6:10 pm I usually supply Acer palmatum and Trident maple seeds each winter. Fresh seed grows better than stored seed.
Or you can get a head start and purchase some seedlings that are already 1 or 2 years old.

Can't help with Acer oliveranum though. I've never even heard the name???

Do you find you need to stratify the seeds in the fridge to get them to germinate?

I've been reading a few different websites - some suggesting 10+ weeks in the fridge, others saying to just plant them.

As this is dependent on climate, it would be good to get your take on it - not sure of your climate exactly, but I'm in Melbourne if that helps.

You should cold/moist stratify at about 4C for 8 weeks in barely damp vermiculite after soaking in hot water overnight. Place the pot in a plastic bag with a few holes in it. You will get vigorous and more even germination. (assuming the seeds are fresh and have not dried out).

Macros wrote: ↑July 19th, 2022, 1:14 pm Last time I planted Japanese Maple seeds, it was a while ago, probably in 2007.
They were off a freind of mine's tree. They were directly off the tree and had undergone natural stratification. Last year, I tried chinese elm, JBP and JWP after stratification in the fridge.
Not a single seed took root or grew a sapling.

The seeds were probably not viable or you made some kind of mistake.
Pine seeds last a long time if kept refrigerated but completely dry. I once sowed a lot of Scots pine seeds that I had in the fridge for more than 20 years. They all germinated well.

treeman wrote: ↑July 19th, 2022, 1:22 pm

Macros wrote: ↑July 19th, 2022, 1:14 pm

The seeds were probably not viable or you made some kind of mistake.
Pine seeds last a long time if kept refrigerated but completely dry. I once sowed a lot of Scots pine seeds that I had in the fridge for more than 20 years. They all germinated well.

Yeah, thats what I'm thinking? It was extremly windy here last year after I did it. Wind absolutly destroyed my little greenhouse.
I had it pegged into the ground and also had large cement blocks on the bottom railings. still wasn't enough, and blew the bastard across the yard!

I'm thinking that had a hand in it.
I planted the rest of the JWP seeds that were in the fridge from last year, last week. Heres hoping!

Macros wrote: ↑July 19th, 2022, 1:35 pm

treeman wrote: ↑July 19th, 2022, 1:22 pm

Macros wrote: ↑July 19th, 2022, 1:14 pm

The seeds were probably not viable or you made some kind of mistake.
Pine seeds last a long time if kept refrigerated but completely dry. I once sowed a lot of Scots pine seeds that I had in the fridge for more than 20 years. They all germinated well.

Yeah, thats what I'm thinking? It was extremly windy here last year after I did it. Wind absolutly destroyed my little greenhouse.
I had it pegged into the ground and also had large cement blocks on the bottom railings. still wasn't enough, and blew the bastard across the yard!

I'm thinking that had a hand in it.
I planted the rest of the JWP seeds that were in the fridge from last year, last week. Heres hoping!

JWP is probably best cold stratified. Black, red or scots don't need it nut it still helps.

Macros wrote: ↑July 19th, 2022, 1:35 pm Wind absolutly destroyed my little greenhouse.
I had it pegged into the ground and also had large cement blocks on the bottom railings. still wasn't enough, and blew the bastard across the yard!

Oh no... That's what I was thinking to do - because my little greenhouse just got blown about in the last few days.

If cement blocks didn't work... have you come up with anything better to help it stay grounded?

Do you find you need to stratify the seeds in the fridge to get them to germinate?

I've been reading a few different websites - some suggesting 10+ weeks in the fridge, others saying to just plant them.

As this is dependent on climate, it would be good to get your take on it - not sure of your climate exactly, but I'm in Melbourne if that helps.

I still get good germination of FRESH maple seeds without any cold treatment. Even seed sown after last frost grows OK but with slightly reduced germination rates.
Maple seed is known to enter deeper dormancy if it is dried and stored for more than 6 months. It then becomes more difficult to germinate. Current wisdom is that soaking seeds in water and keeping at room temp for a few days/weeks before cold treatment seems to help break deep dormancy. Not required for fresh seed.

We experience frost most nights through winter so I usually just sow seeds in trays outside. They get enough natural stratification without all the problems associated with fridge stratification and start to germinate when weather warms up in spring.
Make sure all seeds are protected from seed eaters. Mice and rats are very efficient at finding buried seeds and can clear a whole tray in a couple of nights. Birds also scratch seed trays so mesh covers that allow rain and air in but exclude seed predators is a must for any outdoor seed sowing.

If your seed is fresh from last autumn I'd try sowing outdoors.
If you want some backup put some in the fridge for 6-10 weeks. Keep checking because they do tend to sprout in the bags.
Hydrogen peroxide or household bleach are good to sanitise seeds and substrate before fridge stratification. Seeds tend to go mouldy if you don't sanitise before they go in the fridge.

Not sure why everyone believes that little greenhouses are useful for germinating seeds. More trouble than they are worth Seeds will still germinate and grow just as well, often better, without 'protection'. After all, the worlds forests have done it without little plastic greenhouses for millions of years before we came along.

Agree that Japanese white pine probably germinates a lot better after stratification. I've only had one lot of seed so not extensive knowledge but the only ones that did grow were the few I cracked the nuts. JWP has larger, hard coating round the seeds. My guess is that stratification helps crack those hard coats and let water in to start germination.

[/quote]

Oh no... That's what I was thinking to do - because my little greenhouse just got blown about in the last few days.

If cement blocks didn't work... have you come up with anything better to help it stay grounded?
[/quote]

Yep, no greenhouse

I think it was a Holeman green house with a misting unit I had. I think the issue was, because the frame of the unit it so lite, that it bucked under the stress of the wind?
if i'd thought about it, which i certanly did not, if I had it in a corner against my fence and the garden shed, I think it would have been better off?
Hopefully you can find a solution!

Cheers, Mac