How a Grower Feeds Roses (Discussion)

I've grown roses in pots using both slow-release fertilizer and a water soluble blend. In this video, I'll discuss some of the information sources I've used to make my current fertilizer recommendations. To cut to the chase, while you can grow good roses over a wide range of NPK ratios, my experience, the literature and research seems to support a higher N, lower P and mid to high K. The simplified ratios 3-1-2, 3-1-3, 3-2-2, or 3-2-3 (as locally available at a good price) would each do the job, but for best plant health should also be formulated (or amended) with Mg, Fe and Ca and micronutrients. Note also that there's little support for the high P formulations often marketed as "rose food".

For a quicker discussion (without books & research) aimed at the home gardener, here's a point-form video on the topic:

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