You can add CustomCrops as a dependency for you project. Check the github page for API repo.
Here is the guide helping you get familiar with the API
To get a crop's config
Crop crop = CustomCropsPlugin.get().getItemManager().getCropByID("tomato");
To place a crop (This method would only place the block/entity, see the method below to make it grow)
String itemID = crop.getStageItemByPoint(0);
CustomCropsPlugin.get().getItemManager().placeItem(location, crop.getItemCarrier(), itemID);
To make the crop grow
WorldCrop worldCrop = CustomCropsPlugin.get().getWorldManager().createCropData(location, crop, 0);
CustomCropsPlugin.get().getWorldManager().addCropAt(worldCrop, SimpleLocation.of(location));
To remove a crop (This method would only remove the crop's block/entity, see the method below to remove crop's data)
CustomCropsPlugin.get().getItemManager().removeAnythingAt(location);
To remove crop's data
CustomCropsPlugin.get().getWorldManager().removeCropAt(location);
Get crop's config by existing block/entity
CustomCropsPlugin.get().getItemManager().getCropByBlock(block);
CustomCropsPlugin.get().getItemManager().getCropByEntity(entity);
To check if crops reach the limitation of the chunk
CustomCropsPlugin.get().getWorldManager().isReachLimit(location, ItemType.CROP);
To change a world's date/season
CustomCropsPlugin.get().getIntegrationManager().getSeasonInterface().setSeason(world, Season.SPRING);
CustomCropsPlugin.get().getIntegrationManager().getSeasonInterface().setDate(world, 1);
