Quixote Posted August 29, 2012 Share Posted August 29, 2012 I have been wondering if it's possible to make a San Pedro flower if it's growing all year round in a flowerpot in a window?There's something about the temperature that needs to drop in the winter for some time, but how long exactly, and how cold must it be?Could it be possible to leave the window slightly open during autumn nights and make the cactus flower that way?Or does it need to have very cold temperatures around the clock for months? That would not be practical indoors Quote Link to comment Share on other sites More sharing options...
Stillman Posted August 29, 2012 Share Posted August 29, 2012 if its regularly fertilised I can't see why it won't flower, once its a certain size. I would think at least 50-70 cms. I'm not sure if cold temps are that significant, Cacti are very adaptive plants. Quote Link to comment Share on other sites More sharing options...
woof woof woof Posted August 30, 2012 Share Posted August 30, 2012 going from winter to spring helps to induce flowering. Patchanoi & Peruvianus have never flowered in the Tropics where I am Quote Link to comment Share on other sites More sharing options...
Evil Genius Posted August 30, 2012 Share Posted August 30, 2012 Trichos need a cold and dark winter period so if you keep em in the warm house all year round, they wont flower. Also they need large pots with good rootrun to flower. And lots of nutrients. But if you make sure all the just mentioned things are available, they will most likely flower. 1 Quote Link to comment Share on other sites More sharing options...
Stillman Posted August 30, 2012 Share Posted August 30, 2012 (edited) EG what sort of cold are we talking to get regular flowers? Or do you think it just needs a definite swing in temp or is it a day length issue? We have 10 degree shifts in bottom temp where I am from say 20s + at night in the warmer months to about a stock 10 degrees at night in winter. I know a few people here have said there Trichocereus haven't flowered in 4 years etc but I assumed they may be lacking something in the soil?I might try and force flower a big piece of PC pach I have, hit it with every Canna product I can find lol. Edited August 30, 2012 by Stillman Quote Link to comment Share on other sites More sharing options...
Evil Genius Posted August 31, 2012 Share Posted August 31, 2012 (edited) Hi Stillman, yes the reason some cacti dont flower in some tropical regions is because they dont receive a similar cold and dark period in winter. Just take a look at the climate in the andes and try to mimique it. Temperatures there can get substantially cold, even down to short nightfrosts of -5 to +5 degree celsius. Its not a co-incidence most Trich´s are able to withstand frost to minus 7 degrees and some maybe even a bit more for short periods of time. I guess you´ll need to rubb your cacti with some icecubes. Edited August 31, 2012 by Evil Genius 3 Quote Link to comment Share on other sites More sharing options...
Stillman Posted August 31, 2012 Share Posted August 31, 2012 If thats what it takes EG, lol. I have access to as much ice as I want and am willing to put the pc pach through its passes, next winter. I'll keep you posted. 2 Quote Link to comment Share on other sites More sharing options...
Evil Genius Posted August 31, 2012 Share Posted August 31, 2012 (edited) Yeah you know, i didnt have a very good breeding season this year with very few flowerings as i overwinter my cacti in my cellar where the central heating is. Will need to make sure its colder down there to get them to their full flowering potential. Edited August 31, 2012 by Evil Genius Quote Link to comment Share on other sites More sharing options...
Quixote Posted September 1, 2012 Author Share Posted September 1, 2012 So if I had a shed and put it the potted cactus there for, say, two weeks at around 5 degrees celcius, then took it back in, might it flower the following summer? 1 Quote Link to comment Share on other sites More sharing options...
zelly Posted September 2, 2012 Share Posted September 2, 2012 Oh sure, light, darkness, hot & cold all play specific roles, but what made my trichs literally explode with flowers this year?Why not last year? Or the year before? Even this last winter was warmer than normal.Late winter, early spring rains were the same as previous years.The only defining difference between this year and all previous years was I paid attention to weather reports of impending thunder showers and went out & hoed up the ground around my trich plants & then tossed out liberal amounts of bone meal. & then let the rains soak it in. I did that at least twice in the early spring this year.I've already had one full flush of flowers, yet new buds & flowers continue to form.pic taken 7-20-12, t. peru, some flowers were crossed w/ juuls giant.pic taken 9-1-12, same plant viewed from the opposite sideThis is just one of 6 or 7 varieties that continues to pump out new buds & flowers. 5 Quote Link to comment Share on other sites More sharing options...
Evil Genius Posted September 3, 2012 Share Posted September 3, 2012 Yeah adequate nutrient supply and a reliable water input to bring em to the roots is certainly essential! In the past years i didnt know shit about adequate fertilisation because i notoriously underfertilised them. Now that i pump them during the main growth season, they exploded and started putting out pups too. Btw, i totally like the way you label your crosses! Still need to figure a reliable way out to do that. I used plastic labels that i stuck into the pot but as soon they fall out you are fucked because you need to guess to which flower it belonged. Quote Link to comment Share on other sites More sharing options...
Stillman Posted October 19, 2012 Share Posted October 19, 2012 just spotted this on a T scop its in a big pot. I think being slightly root bound and smashing the ferts is a good start to getting these to flower on command. Fingers crossed it doesn't abort it. Quote Link to comment Share on other sites More sharing options...
trucha Posted October 22, 2012 Share Posted October 22, 2012 (edited) Sure they can flower in pots. They need to get rootbound and reach a certain root maturity first.Most people will never get to see them flower in containers due to repotting them.I don't think its temperature related for pachanoi since it grows in Ecuador and assorted frost free zones and flowers fine. Edited October 22, 2012 by trucha 2 Quote Link to comment Share on other sites More sharing options...
Quixote Posted October 22, 2012 Author Share Posted October 22, 2012 I don't think its temperature related for pachanoi since it grows in Ecuador and assorted frost free zones and flowers fine. I don't think anybody said they needed frost as such, just 'low' temperatures? If they need lower than 20 degrees C then I will find it difficult to achieve that in my livingroom... Quote Link to comment Share on other sites More sharing options...
trucha Posted October 22, 2012 Share Posted October 22, 2012 I'd missed the living room part. I would tend to suspect pachanoi might not want to flower in an environment designed for human comfort. A 20 degree C absolute low won't be appreciated by a lot of cactus species. Quote Link to comment Share on other sites More sharing options...
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