Monster Bloom feeding chart

The Monster Bloom feeding chart is the essential guide to get the most out of this famous bloom booster. This ultra-concentrated additive delivers phosphorus and potassium at the perfect time, helping buds swell and harden like never before.

At GB The Green Brand, we see it every day: growers who use this additive without a plan end up with inconsistent results, while those who follow the steps harvest heavy, dense flowers with outstanding yields. That’s why we share here the Monster Bloom Feed Chart by Grotek step by step, for both photoperiod and autoflowering plants, with clear dosages and practical tips to help your harvest reach its full potential.

Monster bloom feeding chart step by step

The Monster Bloom additive by Grotek is an ultra-concentrated bud booster with a PK 50/30 formula, designed for the mid-to-late bloom stage. Its high phosphorus and potassium levels provide the extra nutrients buds need to gain weight, density and resin, resulting in a more abundant and compact harvest.

Following the Monster Bloom Feed Chart is key to maximizing results during the bulking stage without compromising plant health. Grotek designed a specific schedule depending on whether you grow photoperiod or autoflower strains. The main difference lies in timing: photoperiod plants have longer flowering cycles, while autos follow a shorter, fixed calendar.

How to use Monster Bloom on photoperiod plants

For these plants, the Monster Bloom Feed Chart clearly indicates when to introduce the product and the exact weekly dosage:

The key stages are:

• Week 4: start applying Monster Bloom as flowers begin to set.
• Week 5: peak bulking stage, highest dosage.
• Weeks 6-7: gradually reduce dosage to avoid salt buildup.
• Week 8: flush roots for a clean, smooth-tasting harvest.

How to use Monster Bloom on autoflowers

For autos, the Monster Bloom Feed Chart is shorter, since these strains flower automatically and have a faster life cycle.

Autoflowers complete their cycle in just 9–10 weeks, so there’s less time for extended bloom feeding. Monster Bloom must be applied during their most productive bulking window to maximize results.

Monster bloom dosage per liter: the key to not overdoing it

One of the most important aspects of using this fertilizer is sticking to the Monster Bloom dosage per liter, since its PK 50/30 formula is extremely concentrated. There’s no need to overload feedings: just 0.1–0.2 g/L is enough to achieve explosive bulking without overfertilizing.

This makes it a very cost-effective additive, but also requires precision when measuring. The most common mistakes when dosing Monster Bloom include:

• Thinking “more is better” and using more than 0.2 g/L.
• Not dissolving the product properly in water, causing salt buildup.
• Applying Monster Bloom at every watering instead of just once per week.
• Measuring by eye without tools, increasing the risk of root and leaf burn.

The key is remembering that less is more: when you stick to the exact dose, plants make the most of every gram, producing denser, harder, and more resinous buds.

Can you mix Monster Bloom with other nutrients?

Monster Bloom can be combined with other Grotek products and nutrients from other brands, as long as you respect the dosages and avoid excessive phosphorus and potassium levels. Its PK 50/30 formula is designed as a supplement, not as a replacement for your base bloom fertilizer.

A common combination is Heavy Bud Pro, which provides carbohydrates and secondary minerals to boost flower formation without oversaturating the substrate with PK. It can also be paired with early bloom stimulators, but never with other highly concentrated PK boosters, since that would increase the risk of overfertilization.

Monster bloom sizes and prices at GB The Green Brand

In our grow shop, you’ll find Monster Bloom available in different sizes to fit any grow setup: 20 g, 130 g, 500 g, 2.5 kg, 5 kg, and 10 kg.

• The 20 g size is perfect for beginners or small indoor grows.
• The 130 g jar is the most popular, offering multiple full cycles in medium-sized grow tents.
• The 500 g and 2.5 kg containers are great for experienced growers handling multiple plants.
• The 5 kg and 10 kg sizes are ideal for professional or outdoor grows that require larger volumes.

The secret to getting the most out of Monster Bloom is to follow the official Monster Bloom Feed Chart, applying the exact dosage at the right time. Overuse can stress roots and harm plant health, while correct application guarantees outstanding density, weight, and bud quality.

At GB The Green Brand, you’ll find Monster Bloom Grotek in every size at the best price. Get heavier, more consistent harvests by following the official feed chart.