Two things. First, normally after flap retraction default speed target is 250 so if you go manage it will accelerate to 250 if you want different speed you will have to use preselect or change the default speed below 10000ft. by vertical revision. Second, it is permitted to fly beow green dot speed all speeds upto VLS are flyable, only the bank angle at which ᾳ floor gets activated gets lowered from 45 degrees to 40 degrees. In turbulence the margin could be less.