Okay, so I've been trying to get large amounts of black roses by planting a ton of red roses in c checkered pattern. I watered them all for the past 3 days but I've had a total of ZERO black roses. I was able to get black roses when I only had two roses next to each other. Can someone suggest a possible way of improving the set-up with all the red roses I have (easily hundreds) thanks very much in advance!