New World Little Gardens

My rocket has died is there any way it can grow again.

Sorry to hear that but are you sure it is dead?  If the remaining leaves aren't brittle and if there is still a hint of green in the stalks, then you might be able to salvage your rocket.  Start by trimming off all the dead stalks to about 2cm above the soil and water regularly to keep the soil moist, but not soaking. Apply a layer of compost or straw as a mulch around your plant to help keep water in the soil. Then give your rocket a dose of general purpose liquid fertiliser. You should see new signs of life within 3 to 4 weeks. Treat rocket as a cut-and-come-again crop, and harvest it a few leaves at a time to encourage a plentiful, continuous crop. Good luck!