Why Has My Leaves Gone Yellow

Question

My leaves are not speding out to let new growth out an leaves are yellow

Answer 1

Unfortunately, your photos did not come through, and the type of plant, environment, and care practices were not mentioned. I am unable to diagnose the situation.

Depending on the plant, this can happen due to over/underwatering, under/overfeeding, too much or too little light, low humidity, cold, heat, chemical burns, disease and many, many more factors.