I have a a Charles Grimaldi that bloomed heavily in early spring but completely stopped after that. I was under the impression that it was supposed to bloom all summer. It gets only morning sun. It's growing VERY fast and looks very healthy. I have fertilized it a couple of times it with Miracle Gro Shake N' Feed Bloom Booster. I'm inland California near Sacramento with dry hot days (avg 95F) and cool nights. Are there certain conditions that can inhibit blooming of this plant.
Charles Grimaldi not blooming
brugs are heavy feeders and slow release fertilizers do not release enough nutrients at one time to really benefit the plant. using a Liquid fertilizer 1 - 2 times a week is your best bet.
You can use an all purpose liquid fertilizer or make one of your own using one of the many recipe's DGer's have posted in the 2009 Recipe's thread located here:
http://davesgarden.com/community/forums/t/956114/
Good Luck!
Brugs don't bloom continuously, but in flushes anywhere from 4 - 8 weeks apart when in excellent condition and when they get fed frequently. Some cultivars' flush extends over a period of several weeks where one flush may overlap another making it appear to bloom on and on. Most Brugs tend not to bloom in hot dry weather although some of the newer cultivars will bloom in hot humid climates. Still you get the best flushes in spring and fall. Cue_chik is correct, slow release pellets don't provide nutrients fast enough. Chrissy posted a link recently to JT's info sheets. Brugs produce buds at the junction of the leaf stem and the branch. So they have a greater need for nitrogen. Without new growth, you don't get buds. You can also try foliar feeding your CG in addition to using a fast release fertilizer such as Miracle Grow. I use it as well. It's cheap, easy to find, easy to apply, and it's a complete fertilizer.
You guys gave great advice. I applied as fast release fertilizer and it now has a few new blooms opening up 10 days later. I applied a granular fertilizer called "Greenall Citrus & Avocado Food" (NPK: 14-4-8 with micro nutrients) since it fell within the recommended NPK ratio and the manufacturer says it's suitable for plants other than citrus & avocado. I'm quite cautious with fast release fertilizer so I applied a very small dose top of the soil and watered in. Now that I have tested it, I will work my way up to the recommended dose. Thanks!