If you want to continue watching your cacti grow, bring them inside!!! Most cacti will not survive freezing temperatures for long.

what about sun exposure indoors. do they need?

mankey

not sure which cacti you're talking about, but most have no problem dealing with subfreezing temperatures.
Discusssion here

For cactus - keep them cold and dry, no light necessary. Soil type will influence your success/ failure here.

Keeping cactus warm and in active growth indoors during winter weakens them in the long term, and for many types is not conducive to flowering.

x

thank you guys for your advise.

the cacti-succulents i have:

-Aloe variegata
-Crassula lycopodiodes
-Echinocactus grusonii
-Echinopsis oxygona
-Haworthia attenuata
-Kalanchoe bracteata
-Mammilaria plumosa
-Pachypodium lamerei
-Rebutia muscula
-Sanseveria trifisciata.

do i have to move them indoors? insufficient light applies in my case. pls advise.

I also posted on Frost tolerances !!!

thanks!

Aloe, keep above freezing and dry when it is chilly
Crassula, don't know, some are hardy, some are not.
E. grusonii, hardy in your climate but keep dry in winter, skin may mark in cold humid conditions.
E. oxygona, hardy in your climate, but keep dry in winter.
H. attenuata, best above freezing but can take a little frost.
Kalanchoe, don't know.
M. plumosa, can take some frost but very prone to rot, best above freezing. Often loses roots, may be best indoors and watered occasionally.
Pachypodium, don't think they like frost.
Rebutia, hardy in your climate but must be dry.
Sanseveria, don't know.

For all of these, they should generally be above freezing during the day. Periods of day and night freezing temperatures will damage or kill most of them.