This book contains proven steps and strategies on which plants or vegetables you can put together to help them to grow healthily. By combining plants carefully, plants can help each other in terms of providing nutrients in the soil, offering protection from wind or sun, and also by attracting beneficial insects or acting as a decoy for harmful pests. Just as there are good companion planting combinations, there are also bad combinations. Some plants actually restrict the growth of other plants either by competing for nutrition in the same way, or by excluding incompatible orders, scents, or chemicals. Also, combining different plant species within a farm or garden has an added benefit of improving biodiversity, even if only on a small scale, during a time when we are at risk of mass extinctions of species. It is now a well-established fact that more diverse ecosystems are able to withstand greater shocks and changes, such as pest invasions. Some ideas for beneficial plant companion are listed in this book.