Some seedlings

A gallery of Lithops.
Australian
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Re: Some seedlings

Postby Australian » Sun Mar 19, 2017 12:27 am

Well done... I am sure they will start growing fast in the spring :)

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David1971
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Re: Some seedlings

Postby David1971 » Sun Mar 19, 2017 8:39 pm

Australian wrote:Well done... I am sure they will start growing fast in the spring :)

Thanks Australian. Spring is already here in Southern Spain, with maximum and minimum temperatures of 20-25ºC and 5-10ºC respectively. It is important to seize this period of the year because later the hot makes watering very dangerous, so seedlings must reach it as large as possible. Cheers!

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brom
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Re: Some seedlings

Postby brom » Tue Mar 21, 2017 12:12 am

Very interesting photos, thank you for showing, David!
When did you sow the seeds?
Viele Grüße aus Marienthal
Boris

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David1971
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Re: Some seedlings

Postby David1971 » Tue Mar 21, 2017 2:12 am

brom wrote:Very interesting photos, thank you for showing, David!
When did you sow the seeds?

Hi brom,
I use to sow in autumn because here in southern Spain is the best period for outdoors sowing. These are from early October 2016.

Australian
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Location: Australia

Re: Some seedlings

Postby Australian » Tue Mar 21, 2017 5:31 am

Also here in the sub-tropics we tend to plant Lithops in the fall. I do it from April to October because it is never very cold. Also the beginning of the Fall is wet and still warm (max 30 C daily), so I need to be careful. I don't plant from November to April because it is too hot. Lithops seeds germinate below 25 C.

Allan1
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Re: Some seedlings

Postby Allan1 » Wed Mar 22, 2017 6:38 am

Looking good David, I have just sown my Lithop and Conophytum seeds, as I keep them under lights until next spring, when they go into the greenhouse.
Allan
Orkney
Lithops,Cacti,Conophytums,Tylecodons,Sempervivums and Sedums

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David1971
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Re: Some seedlings

Postby David1971 » Wed Mar 22, 2017 7:31 am

The first batch is going well, yes, but the second batch...I made the mistake of recycling the mineral part of previous sowings and the plants are slowly dying. When I trasplanted the previous year seedlings, I sieved the mix where they grew, keep the mineral part (manly pumice but also other grits), and made a new mix adding my usual proportions of loam and humus. Then I "sterilized" it in the owen and used the mix for the second batch. Germination went well but the seedlings soon began to vanish. I think the problem was that I had the mix too long and at too much temperature in the owen so some kind of chemical reaction occured that is toxic for the plants. Won't make the same mistake twice ;)

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brom
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Re: Some seedlings

Postby brom » Wed Mar 22, 2017 7:46 am

Hi David,
Components should be sterilized separately. It's not a good idea to sterilize the mixture. Old minerals could be boiled in distilled water.
At what temperatures do your seedlings germinate?
Viele Grüße aus Marienthal
Boris

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David1971
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Re: Some seedlings

Postby David1971 » Wed Mar 22, 2017 9:33 am

brom wrote:Hi David,
Components should be sterilized separately. It's not a good idea to sterilize the mixture. Old minerals could be boiled in distilled water.
At what temperatures do your seedlings germinate?

Thanks for the advice brom. I use to sow when maximum and minimum temperatures are about 25ºC and 10ºC respectively.

Australian
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Location: Australia

Re: Some seedlings

Postby Australian » Wed Mar 22, 2017 11:01 am

If you have access to older issues of the MSG Bulletin, there is an article by Piccione who explains why Lithops seedling can shrink and vanish. It has happened to me several times. :cry:


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