#4
Well if your finger brushes the string just right, directly after picking it, a harmonic will ring out at any fret or open string. I do it by accident alot.
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#6
You could do a pinch harmonic, with some difficulty.

You can't do a natural harmonic on an open string, for obvious reasons. But then you can't do them on most frets, can you?
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Roland Cube 30
#7
a natural harmonic is a harmonic on an open string isn't it?

by that i mean you don't really "fret" a natural harmonic, you just put the strings main frequency out of phase.
Rig Winter 2017:

Fender Jazzmaster/Yamaha SG1000
Boss TU-3, DS-2, CS-3, EHX small stone, Danelectro delay
Laney VC30-112 with G12H30 speaker, or Session Rockette 30 for smaller gigs
Elixir Nanoweb 11-49 strings, Dunlop Jazz III XL picks
Shure SM57 mic in front of the amp
#8
Ummm, yeah I think technically the natural harmonic is an open string. Blompcube seemed to make a lot of sense.

Other than that, I would just pinch harmonic it...you still get a cool noise.
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Epiphone Les Paul Standard
Amplifier:
Fender Blues Junior - Eminence Red, White and Blues
Effects:
Fulltone OCD
Electro-Harmonix Nano Small Stone
Ibanez DE-7 Delay/Echo
Dunlop Crybaby
Electro-Harmonix Big Muff Pi
#9
Pinch harmonic, with the fretting hand. You could play the open string then tap the twelth fret but then I guess it is not an open string harmonic.

Craig
Floyd Rose DST-2
Vox AD15VT