What should I use to fertilize my flowers?

I use Miracle Grow.

For most flower gardeners, a complete fertilizer is necessary to supply plants with the three major elements they require to thrive:

• Nitrogen (N): Promotes healthy foliage.
• Phosphorus or Phosphate (P): Stimulates root systems.
• Potassium or Potash (K): Aids in flower (and fruit) formation.

Epsom salts in the water.

We use 16-16-16 for just about any plant. Plant will take what it wants and ignore what it doesn't want.

Hi there, I use miracle grow and seems like it is the most popular from what I have researched.

this stuff is great Jobe's Organics 16lbs. Granular All Purpose Plant Food, Multicolor ; add organic compost in fall to garden beds ; add lots of redworms or earth worms to soil(uncle jim's worm farm to buy them); try to stay away from chemicals(DIY concoctions,herbicides,pesticides) they kill microbes in soil--- they are needed foor healthy soil which gives you healthy strong beautiful plants & flowers; get yourself a composting bin make your own compost using yard waste,garden waste,kitchen scraps best thing for plants/soil and the garbage dumps you can do if you like to garden. here are many ideas-- https://www.youtube.com/results?search_query=diy++low+cost+compost+bins miracle grow has a ratio of 24-8-16, which means that it contains 24 percent nitrogen, 8 percent phosphorus and 16 percent potassium miracle grow has; here is great info. https://www.gardeners.com/how-to/fertilizer-ratios/5161.html

Check into a micro nutrient.

We have many DIY flower fertilizing options, but this is our most popular one: https://chemistrycachet.com/easy-homemade-plant-food/