Fertilizer For Ficus
My Chinese banyan ficus bonsai is showing signs of wanting fertilizer. About last week I noticed a few leaves are yellowing/light green/green veins yellow surrounding tissue. The new leaves are solid yellow and drop off, but the old growth is mostly healthy looking, a few senior leaves lighter green than usual tho. Now a few dozen leaves have dropped. The plant still looks strong and relatively lush/green but I want to nip the problem before it gets really bad. Any suggestions on npk numbers? Do I want high/low nitrogen/phosphate/potash? I was thinking I'd use liquid fertz w/next watering. This is an indoor plant I've had since late spring of this year, it's about 20 years old in a soilless substrate of lava rock and assorted stuff. I haven't fertilized at all since I got the plant this spring. I think it's time, probably long overdue.