Pseudo equivalent width of feature 2 compared with host galaxy properties. Left panels: pre peak epochs (−9 to 2) with colours marking low/high lightcurve stretch SNe. Right panels: post peak epochs (0 to 8) with colours marking low/high lightcurve colour SNe. Top: host type vs. pEW (0 not star forming, 1 moderately star forming, 2 highly star forming. Middle: Log of Host galaxy mass (M_⊙) vs. pEW. Bottom: Log specific start formation rate (log sSFR, yr^-1) vs. pEW.