FoxFarm Open Sesame Soluble Fertilizer, 1 lb Canister - Boosts Early

In this review of the FoxFarm Open Sesame Soluble Fertilizer, the bottom line is simple: gardeners who want a concentrated, high-phosphorus bloom booster that acts quickly will appreciate this formula. The reviewer found it especially useful during the transition to flowering, delivering targeted nutrient delivery at the root zone that promotes robust bud development and noticeably improved flower expansion. For growers using containers, soil or hydroponics who follow a clear feeding routine, Open Sesame is a practical tool to encourage vigorous early flowering and a healthier harvest.

Key Features

• High-phosphorus formula: The 5-45-19 nutrient profile is designed to spark vigorous bloom expansion and support early flower development for larger, fuller buds.
• Targeted root zone delivery: This soluble fertilizer works at the root zone so plants receive nutrients where they need them most during flowering.
• Versatile across systems: Open Sesame integrates smoothly with hydroponic systems, containers, and soil, allowing consistent results across common growing setups.
• Regular feeding routine: Intended for use starting around the fifth or sixth week of flowering and with every watering to maintain steady nutrient levels.
• Trusted brand history: Backed by FoxFarm experience since 1984, the formula reflects decades of fertilizer development and quality control.

Who It's For

Open Sesame is aimed at hobbyist and experienced growers who need a concentrated bloom booster to push plants from vegetative growth into a strong flowering phase. It is ideal for those growing vegetables, ornamentals or fruiting plants who can follow a feeding schedule and monitor plant response.

It is less suited to growers who prefer all-in-one slow-release blends or who cannot perform regular soluble feedings; those users may prefer more passive fertilizer formats. Beginners should still be able to use the product but should reference the FoxFarm Feeding Schedule to avoid overapplication.

Pros & Cons

Pros

• High-phosphorus concentration promotes noticeable flower development and fuller buds.
• Soluble formula delivers nutrients directly to the root zone for efficient uptake.
• Works across hydroponic, container, and soil systems for flexible use.
• Customers report strong growth rate and quick visible results, often within days.

Cons

• Requires regular soluble feedings and attention to dosage, which may not suit growers seeking low-maintenance options.
• Smaller canister sizes mean repeat purchases for large gardens or longer seasons.

Specifications

Product name	Open Sesame Soluble Fertilizer
Brand	FoxFarm
Net weight	1 lb canister
NPK	5-45-19
Use stage	Early flowering / bloom expansion
Suitable for	Hydroponics, containers, soil
Feeding routine	Begin around week 5 or 6 of flowering; use with every watering

Our Verdict

Open Sesame is a focused bloom booster that delivers targeted phosphorus-rich nutrition to support early flower expansion and bud development, making it a strong choice for growers who perform regular feedings. Given its effectiveness across growing systems and FoxFarm's long-standing reputation, it represents good value for gardeners seeking measurable bloom improvement rather than a low-maintenance fertilizer.

Frequently Asked Questions

When should I start using this fertilizer?
Start around the fifth or sixth week of flowering and continue with each watering while observing plant response.

Can I use it in hydroponics?
Yes; the soluble formula is compatible with hydroponic systems as well as containers and soil.

Is this product suitable for all flowering plants?
It works for many flowering vegetables and ornamentals, but users should adjust dosage based on plant size and sensitivity.