about seven to eight months

Subsequently, question is, how many ticks does it take for wheat to grow in Minecraft? 21 ticks

Similarly, how do you know when your wheat is fully grown in Minecraft?

Wheat goes through 8 stages of growth. The beginning stages are green and will have no yield if harvested. Wait until they are somewhat brown, thats fully grown (see image on left of mature wheat).

Why is my wheat not growing Minecraft?

Any of wheat, carrots, beetroots and/or potatoes will only grow under the following conditions: It is directly above a block of farmland. If the farmland is removed or reverts to dirt, the crop will be broken. A light level of 9 or higher in the block above the plant.