well ill tell ya weed plants can take some serios cold wether -1 a couple of nights made mine realy purple and it still lives so dont worry espicaly if your in texis i think thhats were you said your from your weather dosenot get as cold as canada weather hell our igloos didnot even melt this year its been a cold summer but any ways dont worry your plants will be fine when you get frosty nights continuly then worry talk to ya latter!