Please help, what’s this forming on my plant

[Thegreen420]

Hi guys, please could some one explain what this might be forming on my plant

 

[tomatoesarecooltoo]

That's just mineral scale. From hard water, nutrients, or sprays drying on the leaves.

 

[Badchoice]

Yeah just looks like dry nutes or water did you spray them or splash a little during a watering?