Feed Regularly with Liquid Fertilizer
Even a rich soil mix needs replenishment in a confined basket. Every two weeks, apply a balanced liquid fertilizer—like a 10-10-10 NPK blend—diluted to half strength. This consistent feeding supports continuous flower production in prolific bloomers such as petunias (native to South America) without encouraging weak, leggy growth.
Supplement with a seaweed extract every month to boost root development and stress resilience. The gentle nutrients also invite beneficial nematodes into the soil, where they prey on root pests lurking unseen and maintain a healthy underground community.