Plants in Strangeville

[Neodarkside]

Just curious but I've been having an insanely hard time keeping plants alive outdoors in Strangeville. I try to keep them watered and tended but it seems like every morning I'm disposing of at least 2 plants. Its currently summer so its mainly hot, very hot, and heatwaves. I'm assuming those have adverse affects on plants? Curious if I do an underground cellar if they'd keep better?