General sense of spreading or increasing:
* Disseminating: Especially for information or ideas.
* Disseminative: Used as an adjective, meaning "tending to spread."
* Reproducing: For plants or animals.
* Multiplying: For numbers or objects.
* Extending: For something that spreads outwards.
* Expanding: Similar to extending, but emphasizing growth.
Specific to plants:
* Growing: For plants in general.
* Cultivating: For plants that are deliberately grown.
* Sowing: For planting seeds.
* Planting: For putting plants in the ground.
* Germinating: For the process of a seed developing into a plant.
Specific to ideas or information:
* Spreading: For things like rumors or news.
* Disseminating: For information or knowledge.
* Promoting: For things like products or services.
* Advertising: For promoting something.
Other:
* Broadcasting: For spreading signals or information.
* Transmitting: For passing on something.
* Conveying: For carrying something across.
The best word will depend on the specific situation you're using it in.