Repot all together in a trough?

@Snorky85 why don't you get a nice couple of pots and arrange them together and go by colour co-ordination, as I always think they look lovely mixed

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Pot the small cacti up individually into 7 or 8cm pots and repeat annually. Make up a suitable mix using MPC, sand and grit. On the whole you'll be surprised at the low temperatures that dry cacti will take - my small ones are in the shed and the larger ones in an unheated greenhouse. Succulents are far more variable in their cold tolerance and that is something that I'm still finding out about.
As you grow the cacti on some/many/all will produce offsets so you can separate and experiment, maybe keeping the small 'babies' in this spot and the larger ones somewhere cooler. As @pete says, a cool winter period encourages blooming. Where I will disagree with Pete (may the good lord have mercy upon my eternal soul ) is on the subject of light. If (for example) you have an unheated porch with a north facing window that'll be fine as when cool they will effectively go dormant and stop growing - as long as they have access to natural light that's fine.

My advice is stay away from supermarkets/B&Q/Homebase etc. Those wee blister packs of cacti for a few quid can get addictive and you could get overrun with cacti. I speak from experience!

Just a taster of what you're getting yourself into..............
Echinopsis subdenudata by longk48, on Flickr

 

Ooh thanks @longk more fab advice!

Would love to get them flowering. I have a few Christmas catci from cuttings from my grandmas plants and they are fantastic. Shame they dont last very long.

I'm suprised I've taking a liking to them as I recall a horrible incident with one-i must have been under 5 years old at the time and leaned over the window sill and ended up getting dozens of cacti needles in my arm pit. I remember crying and mum having to pull them all out! It was awful!

 

That looks lovely!

 

If you wanted something that is really difficult to get away from you could try Ferocactus, most of them have hooked spines and can be very difficult to get away from, should you get attached.
I've got the scars to prove it.

 

lo studio delle cactacee nel loro habitat | cactusinhabitat
Anyone interested in cacti should look at this ! Stunning habitat images in S.America .
On opening page scroll down and click on 'english' ; the go to top of page and click on A&M .
This gives you an index (on the left) of species to look at growing in their native regions .

 

Hi Snorky,
The long trailing one is an Epiphyllum , also known as an Orchid Cactus. It's not a cactus but a succulent. This wants planting on it's own and coming from a jungle needs high humidity. That's probably why it's started to dry off.
It's worth looking after as they are spectacular when in flower.

 

Epiphyllums are native to sub-tropical Mexico and are normally warm shady forest dwelling epiphytes ; they use other plants (usually tree trunks) as supports , and are not parasitic .
As KFF states , the flowers are stunning but short-lived .Need same conditions as the Xmas cactus (Schlumbergera sp).
All my cacti grow in a 10x8 during warmer months , 95%granite chip mix plus a bit of ericaceous compost . Full sun , plenty of rainwater , low-nitrogen feed and fresh air make for optimum growth .

 

Personally I thought it was the remains of one of these.
SPECIAL DEAL - Red Moon Cactus in Red Pot

Rather than an Epiphyllum, but I may be wrong.

 

@pete is this the same plant in flower

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Thanks for all the great advice.

Yep Pete it looked like that. Lol. I did get it from a v good garden centre though ha ha. The rest are ikea or from my grandma.

 

Well it is kind of similar, but not quite the same, the central spines on mine are hooked and very rigid.
Found a better couple of pics.

 

@pete They're very similar mate

 

So are a lot of cacti @Gail_68 .
You wouldn't believe how many different species there are, often with different latin names, that look just like that, round and spiney

So similar yes in that respect, but not the same, if you get my meaning.

 

In other words @pete same genetic family but carrying a different name