Everything has its time; even plain tea tastes best when freshly brewed.
Literal
Things [location-には] timing, coarse-tea also fresh-brew.
物には時節 means 'things have their proper timing.' 番茶も出花 is a proverb: 'even coarse tea (番茶) is good when freshly brewed (出花).' Together they teach that timing matters — even ordinary things are at their best at the right moment.