Variegated houseplants are often more expensive than plants with solid green leaves because they are more rare and difficult to propagate. Variegation is a genetic mutation that causes the plant to produce leaves with white or pale-colored stripes or patches. This mutation occurs naturally, but it is relatively rare, so variegated plants are not as common as plants with solid green leaves.
In addition, it can be difficult to propagate variegated plants because the variegation is often lost when the plant is propagated by cutting or layering. As a result, variegated plants are often produced by tissue culture or other methods that are more time-consuming and labor-intensive than traditional propagation methods. This added cost is often passed on to the consumer, making variegated plants more expensive to purchase.
Another reason why variegated plants may be more expensive is that they are often in high demand due to their unique and attractive appearance. When demand for a particular plant is high, the price may increase as a result.
Overall, the rarity and difficulty of propagating variegated plants, as well as the high demand for these plants, contribute to their higher price compared to plants with solid green leaves.