Flower Application Rates

Milorganite fertilizer logo in soil with brightly-colored flowers.

Annual Flowers

Annuals play the starring role in the story of your garden. 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
When to Apply Application Rate Suggested Application
Spring - Prior to planting 1 ½ lbs (4 ½ cups) per 50 sq ft Mix into soil when preparing flower bed or container
Mid-Summer 1 lb (3 cups) per 50 sq ft Mix into soil for a nutrient boost

Conversion: 3 cups of Milorganite = 1 pound

Perennial Flowers

Perennials are the supporting actors, giving depth and texture to your garden. They develop more gradually, which makes them perfect candidates for a slow-release organic-nitrogen fertilizer like Milorganite. Apply in early spring when plants begin to emerge and again after plants bloom to strengthen plants for the following year.

Perennial Flower Rates
When to Apply Application Rate Suggested Application
Prior to planting* 2 ½ lbs (7 ½ cups) per 50 sq ft Mix into soil when preparing flower bed
Spring 2 ½ lbs (7 ½ cups) per 50 sq ft When plants emerge mix into soil
Mid-Summer 2 ½ lbs (7 ½ cups) per 50 sq ft Mix into soil to strengthen plants for the following year

Conversion: 3 cups of Milorganite = 1 pound

*For large plants, add an additional ½ to 1 lb of Milorganite in the bottom of the planting hole.

Planting & Watering

Annuals:

  • 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.
  • 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.

Perennials:

  • 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.

For more information on proper planning, plant selection and soil preparation so you can keep your ongoing care to a minimum. Which means more time to relax and enjoy your beautiful garden.