While mushrooms aren’t plants, they can be highly profitable when sold ... but will produce more yield if grown outdoors with more space. One of the most lucrative plants to grow is ginseng.

All you need to earn a huge profit is ... Saffron is the most expensive crop in the world. Why? It’s made out of the stigmas of the crocus plant and it takes around 75,000 flowers to produce 500 grams ...