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Ultimate PK by Mills Nutrients is the definitive flowering hardener designed to transform good crops into legendary harvests. This advanced liquid bio-mineral supplement provides the exact shot of Phosphorus and Potassium your plants need in the final stretch to maximize weight, density, and resin production without altering the natural flavor.
You know the feeling: you've spent months controlling the climate, watering, and pampering your girls, but when the moment of truth arrives, the flowers feel airy, light, and lack that "rock-hard" density you see in magazines. It's frustrating to put in 100% of the effort for only 70% of the results.
If you ignore this phase, you are literally throwing money and time away. Failing to provide the necessary elements during the critical fattening weeks means losing grams per watt, weaker terpenes, and a final product that dries out too quickly and loses its bag appeal. Don't let your hard work vanish into thin air just before the finish line.
The solution is Ultimate PK. This isn't just another additive; it's heavy artillery for your grow room. By introducing this booster, you ensure that every ounce of energy the plant has is directed toward swelling the calyxes and coating them in trichomes. It turns potential disappointment into a record-breaking yield.
Mills Nutrients has developed a formula that stands out because it doesn't just dump minerals into the soil; it ensures they are absorbed. Unlike cheap boosters that can block your drippers or burn your roots, Ultimate PK acts as a deep cleaner for the root zone while feeding it.
It is perfect for growers who want professional results without needing a degree in chemistry. Whether you use soil, coco, or complex hydroponic systems, this product integrates perfectly, keeping the nutrient solution stable and your plants hungry for more.
We know you might have doubts before adding another bottle to your shelf. Here is the reality:
To get those magazine-cover buds, follow these simple steps during the flowering stage:
Yes, absolutely. While it is designed to work synergistically with Mills Basis A&B, its high-quality composition makes it an excellent PK booster to supplement any base nutrient brand you are currently using.
Mills products are known for being pH stable, but adding concentrated P and K can slightly alter the solution. Always measure and adjust your pH after adding all nutrients to the water, not before.
Yes! Autoflowers love a good PK boost in their final weeks. Just keep an eye on the plant's reaction; if they are sensitive genetics, you might want to start with 1.5 ml/L and work your way up.
I've tested dozens of boosters over the years, and honestly, many of them just leave salty residues that ruin the flavor. When I switched to Mills Ultimate PK, the first thing I noticed wasn't just the weight, but the hardness of the nugs. You know that sound when you drop a dry bud on a tray and it sounds like a stone? That's what this stuff does.
My advice: don't get greedy and use it too early. Wait until the flowers are fully formed (usually week 5 or 6 depending on the strain) and then hit them with the 2ml dose. The swelling you see in those final 14 days is insane. It’s one of the few products that stays in my rotation regardless of what strain I'm growing because it guarantees that the harvesting day is always a celebration.
| Cultivation phase: | Flowering | |
| Properties: | Root washing | |
| Brands: | Mills Nutrients |
Yes, the shipment is 100% discreet, no one will know what you have bought, also the sender is SITE OF SHOPS ONLINE.
Yes, we ship to almost every country in the world although you need to know the current legislation in your country to make sure that you do not break any regulations with the germination of the seeds.
UK: 3-4 days (express)
USA: 4-5 days (express)
Australia: 4-5 days (express)
Japan: 4-5 days (express)
Canada: 4-5 days (express)
South Africa: 4-5 days (express)
New Zealand: 5-7 days (express)
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The customer must be informed about the laws of their country regarding seeds or other products that may be purchased on our website, the possession of which may constitute a criminal offence in the country of receipt.
We cannot be made responsible for the wrong use that some people decide to give to the seeds, so please don't act against your national laws.
Due to problems with customs you can check here for restrictions to certain countries.
We accept the following payment methods: Bank transfer, Cryptocurrencies, cash, credit and debit cards and cash on delivery (Spain, Belgium, France, Italy, Portugal).
You can change the currency on the top right to know the price of the products in your local currency and of course pay this way.
In 24/48 hours we will ship your order.
If you live in a country where the cultivation of cannabis is legal and you decide to plant the seeds, it is good that you know that all the seeds that we commercialize have germination guarantee.
If you germinate with the method of paper napkins and you have followed all the steps that we indicate here, you will only have to return us the seeds not germinated in their original packaging and when we receive them we will proceed to the change.
Then we take care of requesting the return to the seed bank, we do not transfer this responsibility and time to our customers.
If you receive a broken product due to transport, you have to notify us within 24 hours for insurance coverage, always contact us as soon as possible and we will fix the problem!
Among all those who comment or send us your questions, there will be a monthly raffle for a €50 voucher for your purchases at Pevgrow. What are you waiting for? Write us and participate!