Where does “hedge sermon” come from?

hedge sermon (English) comes from Dutch hagenpreek, from Dutch preek, from Dutch preken, from Dutch prediken, from Middle Dutch prēdiken, from Old Dutch predicon, from Latin praedicō, from Latin dīcō — small stone, pebble; gravel, rubble.

hedge sermon (English): An open-air religious service held by Calvinists...

Definitions

An open-air religious service held by Calvinists...

Ancestry of “hedge sermon”, step by step

Step	Language	Word	Meaning
1	Dutch	hagenpreek	hedge sermon
2	Dutch	preek	sermon; lecture
3	Dutch	preken	to preach; to sermonise, to lecture
4	Dutch	prediken	to preach
5	Middle Dutch	prēdiken	to preach
6	Old Dutch	predicon	to preach
7	Latin	praedicō	to proclaim, declare publicly
8	Latin	dīcō	to say, talk, speak, utter, mention
9	Latin	-tiō	tion, -ation, -ing
10	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
11	Latin	dissertus	arranged, disposed; explained
12	Latin	disserere	second-person singular future passive indicative...
13	Latin	dis-	asunder, apart, in two; reversal, removal;...
14	Latin	calceus	shoe
15	Latin	calx	limestone; chalk; the finish line
16	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

Every word from Ancient Greek χάλιξ →Every word from Latin -tiō →Every word from Latin dis- →