# Plotting a System of ODE's Phase Portrait

I want to plot a phase portrait, I think I need to use StreamPlot to do this, $$x'=x(a-bx-cy)$$ $$y'=y(d-ex-fy)$$ I know how to plot this with manipulate

Manipulate[Plot[{a/c-b/cx,d/f-e/fx,0},{x,-10,10}],{a,1,10},{b,1,10},{c,1,10},{d,1,10},{e,1,10},{f,1,10}]


but i cannot get the vectors to show direction nor can i graph the nullcline $$x=0$$

Manipulate[
StreamPlot[{0, a/c - b/c*x, d/f - e/f*x}, {x, -3, 3}, {y, -3, 3},
StreamScale -> Large,
PlotLabel ->
Row[{"a = ", a, " , b = ", b , ", c = ", c , ", d = ", d ,
", e = ", e, ", f = ", f }]], {a, 1, 10}, {b, 1, 10}, {c, 1,
10}, {d, 1, 10}, {e, 1, 10}, {f, 1, 10}]


but this gives me no image. Thank you.

Manipulate[