Miracle-Gro Water Soluble Bloom Booster Flower Food 5.5 lb Review

A 5.5 lb water-soluble flower food box for annuals, perennials, roses, hydrangeas, hibiscus, containers, and beds.

Seller pricing varies Updated May 20, 2026

Bottom line

Miracle-Gro Water Soluble Bloom Booster Flower Food gives flower beds, porch planters, and flowering shrubs a large crystal-feed refill.

Miracle-Gro Water Soluble Bloom Booster Flower Food 5.5 lb box

What this review covers

This review focuses on the 5.5 lb box, flowering plant use, water-soluble format, and the measuring habits that help flower feeding stay organized.

The upside

  • The 5.5 lb box gives flower beds and container groups a large water-soluble refill.
  • The product page points the feed toward annuals, perennials, roses, hydrangeas, and hibiscus.
  • The crystal format mixes into watering-can batches for planned flower care.

The tradeoffs

  • The large box needs a dry storage space with the label easy to reach.
  • Flower feeding still needs plant checks, soil moisture checks, and careful timing.

Fit and feel

Good match:

This box fits gardeners who want a large water-soluble flower food refill for annuals, perennials, roses, hydrangeas, hibiscus, containers, and beds.

What to know:

Flower feed days work well with a quick plant walk. Look at the leaves, blooms, soil surface, and weather before mixing the batch.

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Full review

A large box for flower feed days

Miracle-Gro Water Soluble Bloom Booster Flower Food is a 5.5 lb box for annual and perennial flowers, in-ground plantings, containers, roses, hydrangeas, and hibiscus.

The size gives a flower shelf a steady refill for repeated watering-can batches through the active bloom season.

It belongs near flower notes

Flower feeding is easiest when the gardener already knows which pots, borders, or shrubs are getting attention. Keep plant names, dates, and weather notes near the box, then mix the label amount for that day.

The dry crystals should stay sealed and dry between sessions.

The mix step feels straightforward

Measure, dissolve, and water around the soil. That simple sequence works well around porch planters, patio containers, flower beds, and flowering shrubs.

Use a clean cup or scoop each time so the box stays tidy and ready for the next round.

Good match

This box fits gardeners who want a large water-soluble flower food refill for annuals, perennials, roses, hydrangeas, hibiscus, containers, and beds.

What to know

Flower feed days work well with a quick plant walk. Look at the leaves, blooms, soil surface, and weather before mixing the batch.