Using juice fertilizer, how regularly should I fertilize my geraniums planted outside?
I do every fortnight
No offense to anyone, but Winkie offers a valid suggestion.
Your issue within part, involves soil composition, rainfall, or watering, how much SUN the plants win, and certainly any ZONE you may be surrounded by. If flowers need fertilizer it commonly means they aren't getting satisfactory of something from the soil, or in the attention given them. Flowers, contained by seasonal confines, usually do well satisfactory naturally.
You should also check casing for instructions regarding keeping any chemicals OFF of leaves and flower blooms, and ask at the garden center.
Just my two "sense"
Answers: No more than once a month.