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by iann
Fri Feb 16, 2018 8:52 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Systemic insecticide for red spider mite
Replies: 32
Views: 3575

Re: Systemic insecticide for red spider mite

Please forgive my ineptitude... I am a professional gardener and I have been growing all sorts of plants for a good 40 years, but I have had a very busy week and am a bit woozy!.... Are we saying thiacloprid might be ok to use against flat mites? I mean, in this case it is in an isolated spot indoo...
by iann
Fri Feb 16, 2018 2:17 pm
Forum: The Cactus & Succulent Plant Forum
Topic: New to me?
Replies: 4
Views: 180

Re: New to me?

That book is a new publication.
by iann
Tue Feb 13, 2018 9:20 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Optica rubra
Replies: 2
Views: 204

Re: Optica rubra

Nobody? There are always some on eBay, although prices seemed silly when I looked today. And what on earth is this? Not all that is red is Rubra apparently.
by iann
Sun Feb 11, 2018 2:56 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Not the most spectacular display
Replies: 4
Views: 423

Re: Not the most spectacular display

They'd perhaps naturally flower in late December or early January, but not here unless I force them. By February the sun can get strong enough to move the flowers but they tend to look a bit tired after waiting for so long.
by iann
Fri Feb 09, 2018 2:47 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Dioscorea rupicola - watering
Replies: 21
Views: 593

Re: Dioscorea rupicola - watering

You can be pretty generous with these when they're in growth, especially if it's in the summer. No point leaving them dry for any length of time. I haven't grown D. rupicola but yours looks tiny for its age.
by iann
Fri Feb 09, 2018 2:45 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Not the most spectacular display
Replies: 4
Views: 423

Not the most spectacular display

A few raggedy flowers in my Lithops optica dish, about as much as I can expect in February.
optica-0209.jpg
by iann
Sat Feb 03, 2018 11:25 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Seedlings - a nice shade of red
Replies: 6
Views: 405

Re: Seedlings - a nice shade of red

Propagator lights, depending on strength, can certainly turn cactus seedlings red. Red is certainly from some sort of stress, but usually high light or low temperatures rather than just lack of water. 3-5C is pretty chilly for most cactus seedlings and would contribute to the colour. 20C is also not...
by iann
Sat Feb 03, 2018 11:17 pm
Forum: The Cactus & Succulent Plant Forum
Topic: Dioscorea rupicola - watering
Replies: 21
Views: 593

Re: Dioscorea rupicola - watering

D. rupicola comes from a summer-rainfall habitat and is described in several sources as growing in summer. Habitat is at altitude and mostly shaded.
by iann
Sat Jan 27, 2018 8:16 pm
Forum: The Cactus & Succulent Plant Forum
Topic: What is the best time of year to plant my seeds indoors?
Replies: 16
Views: 780

Re: What is the best time of year to plant my seeds indoors?

Overall, I'd be looking at 22/8C as a good starting point. You can go warmer and may get good results, but go too hot and lots of mesemb seed won't germinate (some might, anecdotally with very high temperatures, but my experience as been that they germinate *after* the very high temperatures stop). ...
by iann
Fri Jan 26, 2018 6:21 pm
Forum: The Cactus & Succulent Plant Forum
Topic: What is the best time of year to plant my seeds indoors?
Replies: 16
Views: 780

Re: What is the best time of year to plant my seeds indoors?

All the species you list will need quite cool nights, or they may not germinate. It is common for them to be too warm under lights. A south-facing window is often more successful. If you can keep it cool enough, extra light can be useful until there's some real light in a few months time. They shoul...

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