Boost your flowering with PK supplements
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It's official: outdoor gardens are in full swing. Those plants that just a few weeks ago were tentatively stretching out in the sun are now finally in full bloom, unfurling buds and trichomes like there's no tomorrow. At this point—and you already know this—base fertilizer falls short. The plants crave more. More phosphorus, more potassium, more energy to fatten those flowers, harden those buds, and sparkle with diamond-like trichomes.
And that's where PK supplements come in, those additives that allow your plants to show their full potential at this important stage and become the queens of the garden. If you grow outdoors, the time is now. If you grow indoors, you'll need them soon: this is the tool that makes the difference between a good harvest... and one you'll proudly show off.
Phosphorus and potassium: two key elements in flowering
Let's get serious: Phosphorus (P) and potassium (K) are the two elements that lead the charge during the flowering phase, allowing your plants to form huge, tight buds. They're like your plants' personal trainers: they won't make them flower faster, but they will boost their yield to its peak.
Phosphorus promotes the development of secondary roots and improves energy transport within the plant. It's responsible for ensuring your flowers develop with structure, consistency, and without sluggishness. Without phosphorus, the plant begins to look dull, failing to form those huge colas you love so much.
Potassium, for its part, regulates the opening and closing of stomata, participates in sugar synthesis, and helps the plant withstand stress, pests, and even the summer heat wave. It's also essential for the accumulation of essential oils and terpenes, which results in more flavorful, aromatic, and long-lasting flowers.
The moral? Without P and K, there's no paradise. Or at least not one worth bragging about on social media and among your colleagues.
What are PK boosters?
By now you've probably guessed it, but let's put it into words. PKs are nutritional supplements designed specifically for the flowering phase. They don't replace base fertilizers, but rather complement them, reinforcing the supply of phosphorus and potassium just when the plant needs it most. Combined with a good base fertilizer, they become the ideal complement to get the most out of your plants. You've been nurturing them for months, so the smartest thing to do is make sure they provide you with as many dense, fragrant flowers as possible.
There are many types of PK supplements: liquid, solid, water-soluble, organic, mineral, bio-mineral, adapted to coco, hydroponics, or Mother Earth. Some are applied throughout flowering, others only in the final phase (that sprint where every drop counts). What they all have in common is their ability to stimulate the formation of larger, more compact, heavier, and resin-laden flowers.
Now, be careful with the dosage: overdoing it with a PK can be as harmful as underdoing it. The EC can skyrocket, and your plants can become saturated, locking out nutrients, or slowing down the process. So, the golden rule: always follow the manufacturer's instructions as if they were a haute cuisine recipe. Don't just "eyeball" them. Ideally, as always, you should monitor the amount of fertilizer you use with an EC meter; it's the best way to avoid surprises and ensure you're working with the ideal amount of salts for your plants. And the same goes for pH... providing large amounts of P and K will be useless if you do so with an incorrect pH value, as the plants won't be able to assimilate this extra supply of these two elements.
Featured PK boosters in Alchimia
We know the market is rife with products promising "explosive flowering," "XXL yields," and "legendary terpenes." But at Alchimia, we know how to separate the wheat from the chaff. We present some of the most effective, recommended, and, why not say it, charismatic PK supplements in our catalog. Each with its own unique characteristics, but all are highly effective and with which you'll truly notice the difference.
Of course, we're not going to tell you about the entire offering available in our store, but only about some of the products, so we invite you to visit it to learn more about PK additives and supplements that can help you achieve the perfect harvest, one that will leave you and your friends speechless.
Biotabs PK Booster Compost Tea
Ideal for organic growers with an alchemist's soul. This supplement comes in powder form and is activated by preparing an aerated compost tea. Biotabs PK Booster Compost Tea contains bat guano, seaweed, and beneficial bacteria that release P and K gradually and sustainably. It not only improves flowering but also strengthens the substrate's microbial ecosystem.
Directions for use: Apply between weeks 3 and 5 of flowering. Best combined with Orgatrex and Bactrex for complete organic synergy.
Biotabs Bio PK 5‑8
The liquid, biodynamic brother. Contains phosphorus, potassium, organic nitrogen, molasses, vitamins, enzymes, and phytohormones. Biotabs Bio PK 5-8 is a complete and balanced PK designed to stimulate flowering, resin, and flavor without disrupting the crop's ecosystem.
Recommended dosage: 1 to 3 ml/L from the second week of flowering until root flushing.
BAC Organik PK Booster
For those who want to grow organically without sacrificing the best flavor and excellent yield. BAC Organik PK Booster is a liquid supplement containing plant extracts, molasses, and natural minerals. It stimulates flowering, strengthens cell structure, and improves flower sweetness.
Important note: Not suitable for automatic irrigation, as it may clog the pipes!
Bloombastic by Atami
A modern classic. With its PK 20-21 formula and a cocktail of sugars, minerals, and enzymes, Bloombastic is ideal for the mid- to late-flowering phase. It stimulates resin production, improves aroma, and boosts final weight without excessively increasing EC. Suitable for all systems.
Application: from the 4th week of flowering.
Rokzbastic from Atami
The hardcore version of Bloombastic. With PK 10-20, extra iron, and a higher concentration, Roczbastic is designed for final fattening of buds, leaving them rock-hard. Ideal for experienced growers who want to squeeze every last gram from their harvest.
Caution: Carefully monitor the EC value of the nutrient solution.
Athena PK Booster
From the USA comes this high-end mineral PK, with phosphorus, potassium, magnesium, and sulfur. Athena PK Booster is designed for cocoa or hydroponic crops, where maximum availability is required without disrupting the nutritional balance.
Dosage: 0.8 to 2.6 ml/L from week 3 of flowering.
Outdoor cannabis harvest: tips and tricks
Harvesting your outdoor plants can be a difficult time if pests or environmental harsh conditions are involved. In this article you'll find some tricks to successfully harvest your outdoor crop, limiting all the negative factors that could work against you when it comes to obtaining maximum quality flowers.
A little push... that makes all the difference
You see, PK supplements aren't just an extra; they're a turning point. When the crop enters its decisive phase, what you give your plants is reflected—unfiltered—in the final result: denser buds, richer aromas, abundant resin, and a feeling of satisfaction as a grower that's hard to describe.
The final piece of advice? Choose your PK based on your growing style, your environment, your goals… and let nature do the rest.
Happy harvest!
