those kind of temp swings can be confusing for plants "oh, 70! I can grow now!" "oh, 30's, I can't grow now!" . . . last night we got pretty cold here - down in the 30's but I don't think we went below freezing, but we should be up to near 90 by tomorrow and pretty much mid 80s' all the other days, with nights staying in the 40's. I noticed some asparagus coming up near one of my blueberry bushes. But all it's ever done is sprout a few of the real thin feathery wispy stuff. I've never gotten a nice asparagus spear, even though I planted a few asparagus crowns about 5 yrs ago.