Actually, adding plants to a cycling tank will slow down or even stop the cycling process depending on type and quantity of plants etc. This is because plants take up ammonium, nitrites & nitrates: The Ammonium & nitrates that would otherwise be used to feed the growing bacterial colony in the filters (the cycling 'process').
It is argued therefore that you do not have to cycle a new tank that is fully planted: Plants in on day one, full stock of fish on day two. The fish feed the plants, in other words, the plants (and substrate) are the filter. This is best left to experienced plant growers.....
Andy