Yes, hydrogen peroxid is a good choice to kill many fungi on the seeds. Using acid it is important to have the correct concentration (96%) - the often used lower concentration for car batteries does not help - and the chosen period must be effective (too short - it will not work, too long - the embr...

It is better to wash the seeds before sowing.
I can't believe that the seedlings love the acid.
Greetings Nobby

A thick Echinopsis seems to be a good stock for the future.

Nobby

If you still have some seeds treat these for 5 minutes with 96% sulfuric acid (handle with care) and you will see 60-80 % germination. Don't ask why but it works. This was the result after 8 month and ~ 50 seeds (5 seeds had been grafted before and they are still living). Eriosyce_umadeave_LasCuevas...

We just came back from the fantastic TSG Meeting in Coddington and were welcomed by this: Ptero_australis.jpg Just in time for pollination. Perhaps next year we only bring seeds. :grin: Elisabeth and Norbert (Pterocactus australis SAR 4181 - Rio Santa Cruz, Santa Cruz, AR with 18 flowers and some mo...

Chris, good mood, some questions, a terrible pronunciation, my wife (with a better pronunciation) and perhaps some Pterocacti.
See you (all) on Sunday
Norbert

I am going to participate for the first time.
I am really looking forward to it!

Cheers
Nobby

Hi Dave,

yes I'm Norbert Sarnes for my whole life.
I'm looking forward to meet you at the Cactus Explorer meeting.
I hope everyone will understand me - but we will let our pictures speak for us.

See you
Nobby

Thank you Dave for this beautiful travelogue.

It was a pleasure to see your pictures.

Friedrich Ritter (9 May 1898 - 9 April 1989) was one of the most important cactus-explorers of the 20th century. Specially in South America he undertook numerous research trips to explore the cactus flora. He published his findings in many journal articles and in several books, but especially in his...