Vegetable Growth Stages allow you to set different meshes the plant uses depending on the current vegetable growth of the plant.

To change a plants Vegetable Growth Stages settings go to the plants blueprint so for example the BP_TomatoPlant and select the BP_PlantComponent in the Components panel, then in the Details panel and inside the Plant Settings Category find the Vegetable category like the image below.

You can enable or disable this system using the Use Vegetable Growth Stages setting.

Here you can set the different static or skeletal mesh the plant will use at certain vegetable growth amount. To change when the meshes will be used you can set the Growth setting for that Index in the Growth Stages setting. Here you can also change the static mesh or skeletal mesh that will be used for that growth value.

In the image above the plant will only start using the static mesh once the vegetables growth reach 80, until then the plants previous static mesh will be used, either from the plant growth stages or if they are not being used the static mesh set in the Static Mesh Components settings.

To add new vegetable growth stages used the + button, to remove existing ones click the down arrow next to the index and select Delete.

You can also set the Effects for each growth stage this can be a sound and/or particle effect that will be played at the plants location.