I have found the following translations for to start from scratch:
(ganz) von vorn(e) anfangen/starten/beginnen
bei Null anfangen/starten/beginnen
And for to do sth from scratch:
- von Grund auf
Also for instance, in Linguee one can find the sentences:
He learned it from scratch. — Er hat es von der Pike auf gelernt.
production from scratch — Neuanfertigung
Which form sounds the most natural for this expression? Is there any other equivalent form, specially with the word scratch?
I would really appreciate if someone would digress a bit about this.