Coriander (Coriandrum sativum) is a powerful and versatile herb to have in your cannabis garden. Similar to parsley, coriander is relatively easy to grow. Coriander is an active natural repellent to aphids, potato beetles and spider mites. This plant is renowned for attracting beneficial insects like tachinid flies, hoverflies and a variety of parasitoid wasps that prey on bad bugs or their larvae. It is also a great companion to dill. Coriander enjoys a humid, well lit environment however can struggle when exposed to too much direct sunlight. Coriander plants need plenty of water, though make sure your cannabis garden has adequate drainage.