Flower Application Rates

Brighten your flower palette with Milorganite, the organic fertilizer that feeds floral gardens for 8-10 weeks. Choose Milorganite for fewer applications and better results.

For advice on applying Milorganite properly for flowers, please see our application rates below. And don’t worry if you accidentally spread too much Milorganite, Its goof-proof formula won’t burn your flowers.

Milorganite also has a long tradition with rose and daylily societies around the nation. Their members know that Milorganite is an essential step in growing show-stopping displays of roses and day lilies.


To get the most visual pop, you need to give your annuals all the nutrients they need to grow big and beautiful. Follow the tips and rates below and prepare for rave reviews.

Annual Flower Rates Rate
Spring 1 1/2 lbs per 50 sq ft
Summer 1 lbs per 50 sq ft
*Conversion: 3 cups of Milorganite = 1 pound


Perennials develop more gradually, which makes them perfect candidates for a slow-release organic fertilizer.

Perennial Flower Rates Rate
Spring 2 1/2 lbs per 50 sq ft
Summer 2 1/2 lbs per 50 sq ft
*Conversion: 3 cups of Milorganite = 1 pound
**For large plants, add an additional ½ to 1 lb of Milorganite with soil in the bottom of the planting hole.

Planting & Watering


  • Till the soil 2 to 3 inches below rooting depth. Break up any clods and remove sticks and debris.
  • Water the annuals well at planting or transplanting. After plants reach mature size, water them twice a week to rooting depth. Too frequent of watering promotes surface root growth, which can limit plant vigor.


  • Remove any sod or previous plantings from the area you wish to plant. Till the soil to at least 6 inches below rooting depth. Plant according to specific directions for each type of perennial you choose.
  • Water the plants thoroughly when transplanting. Keep the soil moist until plants set. Then, water the plants weekly to rooting depth. Shallow watering encourages shallow roots, which can stress plants during hot and dry summer conditions.


Mulch around the plants to protect roots from hot summer weather and to help control weeds. Remove dead flowers to encourage further new buds and flowering.