Royal Gold Imperial Boost 0-15-11 | 5lb - (Case of 8)

Nitrogen-Free 0-15-11 PK Booster for the Late-Bloom Finish, 5lb

Nitrogen that lingers too late into flowering can work against a plant right when it should be focused on ripening and finishing rather than continued vegetative-style growth. Crown Jewels Imperial Boost removes nitrogen from the equation entirely with a 0-15-11 ratio, concentrating delivery on the phosphorus and potassium plants need most in the final weeks of bloom.

This 5lb bag, sold in cases of 8, suits home growers and small operations feeding a limited number of containers through the late-bloom finish.

Key Features & Benefits

• Nitrogen-free 0-15-11 ratio — eliminates nitrogen to avoid late-bloom growth suppression while concentrating on phosphorus and potassium.
• High 15% phosphorus — supports the energy-intensive final stages of flower and fruit development.
• 11% potassium — drives sugar and carbohydrate accumulation during the finishing phase.
• OMRI Listed and CDFA Approved — certified for use in certified organic late-bloom finishing programs.
• Late-bloom timing — formulated specifically for the critical final weeks of the flowering and fruiting cycle.

Who Should Use This

Organic growers whose plants have entered the late-bloom or fruiting finish and want a nitrogen-free PK boost during the final weeks before harvest benefit from Crown Jewels Imperial Boost. It's built for certified organic soil and soilless growing programs looking to support finishing quality.

About Royal Gold

Royal Gold has spent nearly two decades building its reputation from a small family operation in Humboldt County, California, to a company with mixing and packaging operations that now also span Upstate South Carolina. The Crown Jewels line, including this late-bloom PK booster, extends the same small-batch standards Royal Gold applies across its potting soil and amendment products.

Frequently Asked Questions

Why does this fertilizer contain no nitrogen at all?

During the late-bloom and fruiting stage, residual nitrogen can suppress the ripening and finishing processes that define harvest quality. Removing nitrogen entirely and concentrating on phosphorus and potassium aligns the feed with what the plant needs most at that stage.

When should I start using Imperial Boost in my feeding schedule?

Introduce it during the late-bloom or fruiting phase, once flowers or fruit are well established and the plant is moving toward its finishing stretch. Using it too early can shortchange the nitrogen a plant still needs during earlier bloom development.

Is Crown Jewels Imperial Boost certified for organic growing?

Yes, it's OMRI Listed and CDFA Approved, meeting the standards of both the Organic Materials Review Institute and the California Department of Food and Agriculture for certified organic production. This certification allows certified organic growers to apply Imperial Boost during the critical late-bloom push without jeopardizing their organic status.

Can I use this alongside Crown Jewels Bloom?

Yes, many growers run Crown Jewels Bloom through the main flowering stage and layer in Imperial Boost during the final late-bloom weeks for an added PK push. Follow labeled application rates for both products to avoid over-fertilizing.

How do I apply this granular fertilizer during late bloom?

Work the granules into the top layer of soil or soilless media around the root zone during the late-bloom stage, then water thoroughly. Reapply on the schedule stated on the product label through the finishing weeks of the cycle.