When to Fertilize?
I have lots of little dahlias coming up now ranging from just poking through to ones that were started indoors and are 12 inches+ (even one that's already blooming!)What should I do about fertilizing? I didn't at all last year and still had a bunch of tubers make it through the winter to grow this year but they (the tubers) were really small compared to the ones I ordered this spring. Does it matter as far as growth and bloom goes that the tubers were small? What should I fertilize with? And when?