Search found 4526 matches

by greenknight
Fri Aug 12, 2022 1:22 pm
Forum: Succulent Growing Help
Topic: Cactuses sleeping during summer
Replies: 1
Views: 27

Re: Cactuses sleeping during summer

When nighttime temperatures are too warm, many cacti will go dormant, and you shouldn't water them then. They should wake up when the temperatures drop below about 20c at night, though. How hot is it now?
by greenknight
Fri Aug 12, 2022 4:06 am
Forum: General
Topic: A Blooming Thread
Replies: 353
Views: 96670

Re: A Blooming Thread

Hallo greenknight, is that really almost exactly one year ago that yo possted that nice Mamm? I caught my usually reliable Mammillaria rhodantha ssp. pringlei making a nice display just before our most recent heat wave: I have a plant looking & blooming similarly. It was named Mammillaria polyt...
by greenknight
Wed Aug 10, 2022 5:51 am
Forum: General
Topic: Winter preparations Question?
Replies: 15
Views: 139

Re: Winter preparations Question?

Imidacloprid takes months to break down, I don't think you need to apply it again this season.
by greenknight
Tue Aug 09, 2022 4:00 am
Forum: General
Topic: Winter preparations Question?
Replies: 15
Views: 139

Re: Winter preparations Question?

Agreed that you should get them dry before you bring them in. Those temperature are higher than ideal, a little sip of water once a month may be needed to keep the roots of some cacti alive. Not enough water to induce growth, just enough to keep them from shriveling excessively. Some cacti are prone...
by greenknight
Mon Aug 08, 2022 12:53 pm
Forum: Succulent Growing Help
Topic: Concerns regarding Euphorbia cylindrifolia
Replies: 3
Views: 124

Re: Concerns regarding Euphorbia cylindrifolia

The way the roots are formed, you couldn't raise the caudex above the soil without also leaving a lot of roots exposed - I wasn't suggesting that! But I think there's a good chance that better soil is all it needs to perk it up.
by greenknight
Mon Aug 08, 2022 8:17 am
Forum: Succulent Growing Help
Topic: Concerns regarding Euphorbia cylindrifolia
Replies: 3
Views: 124

Re: Concerns regarding Euphorbia cylindrifolia

It's normal for this species to have a caudex - though, according to Llifle, when grown from a cutting it usually fails to produce one. You got lucky! Kind of a rugged look is also normal. it doesn't look that bad. I don't think a heavy pruning is needed. I would just re-pot it in better soil, setti...
by greenknight
Thu Aug 04, 2022 3:24 am
Forum: Cultivation
Topic: A surprise in the greenhouse.
Replies: 5
Views: 157

Re: A surprise in the greenhouse.

It's like somebody who wakes up after years in a coma.
by greenknight
Wed Aug 03, 2022 11:30 pm
Forum: Cacti Identification
Topic: What am I please.
Replies: 6
Views: 212

Re: What am I please.

There are a lot of random hybrids, too.
by greenknight
Wed Aug 03, 2022 10:39 am
Forum: Cultivation
Topic: An Echinopsis question
Replies: 4
Views: 147

Re: An Echinopsis question

Bud set happens during dormancy, appears in the spring as an enlarged areole. If you don't see any of those, no chance of flowers this year (though they don't always develop the first year after the bud is set).
by greenknight
Wed Aug 03, 2022 4:43 am
Forum: Cultivation
Topic: An Echinopsis question
Replies: 4
Views: 147

Re: An Echinopsis question

They like a little more water than most desert cacti, maybe you're not giving them enough.

Echinopsis hybrids are generally easy to grow.
by greenknight
Tue Aug 02, 2022 7:34 am
Forum: Cultivation
Topic: Some of my young San Pedro's Need help standing fall over.
Replies: 4
Views: 134

Re: Some of my young San Pedro's Need help standing fall over.

The only way too much water would make them droop is if they rotted, which doesn't appear to be what's happening here. You've got two different cases: where the stem is bending over, and where the stem is still straight but it's leaning. The second case tells me you didn't firm the substrate down ad...
by greenknight
Mon Aug 01, 2022 6:18 am
Forum: Cultivation
Topic: Watering question
Replies: 5
Views: 141

Re: Watering question

Agreed, that soil is staying wet much too long.

In the winter, they should be dry so they go dormant. You don't want them growing when the light levels are lower, and it sounds like the light is none to good at the best of times.
by greenknight
Sun Jul 31, 2022 3:43 am
Forum: Sick Cacti - Pests, Diseases, etc.
Topic: Cleistocactus strausii keep dying
Replies: 7
Views: 260

Re: Cleistocactus strausii keep dying

Maybe you should forget about growing them in pots and plant them in the ground outside, at least the roots would stay cooler.
by greenknight
Fri Jul 29, 2022 11:13 pm
Forum: Sick Cacti - Pests, Diseases, etc.
Topic: Cleistocactus strausii keep dying
Replies: 7
Views: 260

Re: Cleistocactus strausii keep dying

The coolest place in the greenhouse is on the ground, maybe if you set them down there when it gets real hot it would help.

I'd suggest added shading during heat waves, but I see from your greenhouse thread you already thought of that.
by greenknight
Fri Jul 29, 2022 2:30 am
Forum: Succulent Growing Help
Topic: Difficulties with Lobivia famatimensis
Replies: 3
Views: 213

Re: Difficulties with Lobivia famatimensis

I've found that cacti with weak root systems often will revive if they're under-potted (note that Lifle also suggests under-potting for this species). Problem is, it has a tap root so it needs a deep pot. My solution in such cases is to put rocks in the pot to take up the extra space, leaving a hole...