gardenersdetective,
There are no Brugs that bloom all summer. They bloom in flushes that can last for weeks depending on the cultivar. Then they stop blooming and rest for periods up to 8 weeks. During this time, they produce buds. This tendency is very obvious in B. suaveolens, a species whose blooms open almost all at once. A large mature plant can have up to a hundred or two blooms at once. There are some varieties whose blooms open over a longer period of time making the rest period seems shorter.
As Charleen and Linda stated Brugs are heavy feeders and fertilizing them up to twice a week is not out of the ordinary. However,it is never a good idea to use more than the recommended dosage per use. It's more than a plant can use a once and what is left over can burn the roots, increases the salt content in the soil.
Brugs produce two kinds of growth: vegetative and flowering. The reason your Brugs don't bloom until late in the year is because Brugs, that come back from the roots or are taken from cuttings far down on a trunk, have to put out a certain amount of vegetative growth before they branch (produce a "Y") and switch to flowering growth. To get your Brugs to bloom earlier in the season, take large cuttings that include the "Y", root them and overwinter them indoors. Cuttings taken from above the original "Y" on the mother plant continue to produce "Y"s and bloom as if they were still attached to the mother plant.
