Gold Label
Gold Label Ultra PK Booster
Pickup available at Sheffield store
Usually ready in 1 hour
Shipping & Returns
Our current shipping rates are as follows:
- UK Orders Over £50 – Free Next Day Delivery
- UK Orders Under £50 – £8 (Next Day Delivery)
- UK Orders Next Day AM – £20
- UK Orders Saturday AM – £30
- International Orders DAP – Select between UPS or Fedex and we'll sort the rest. (All duty paid by us prior to shipping)
All parcels are fully tracked. Once your order has been dispatched, you’ll receive an email containing your tracking number.
If your order is classed as an oversized item OR deemed extra heavy, additional heavy shipping duty will be added at checkout when selecting your shipping options.
Returns
We want you to be completely satisfied with your purchase, but if you change your mind, you may cancel your order within 14 days of receipt for a full refund, provided the items are unused and in resalable condition.
Once your cancellation has been confirmed, you must return the items within 14 days, ideally in their original packaging.
Click & Collect
Order online and collect directly from our Sheffield OR Barnsley store. Once your order is ready, you’ll receive an email or phone confirmation with collection details. Please wait for confirmation before travelling to ensure your order is prepared.
Please have your order number ready to give to a member of staff when you arrive.
Sheffield Store:
GSH Retail Ltd
Unit 5, 230 Woodbourn Road
Sheffield
S9 3LQ
Barnsley Store:
GSH Retail Ltd
Unit 6, Rockingham Business Park
Rockingham Row, Birdwell
Barnsley, S70 5TW
Local Same Day Delivery Service
Our man in a van!
Same-Day Delivery Service
Enjoy fast, reliable, and fully discreet same-day delivery with Green Spirit when you order from our Sheffield store area.Whether you shop online or
in-store, we make getting your items easy,convenient, and secure.
Order Online
When placing your order through our website, simply select the Same-Day Local Delivery option at checkout.
- Free Same-Day Delivery on orders over £250.00
- Available customers within a 3-mile radius of our Sheffield store (S9 3LQ)
- Orders under £250.00 can still be delivered the same day for a £50.00
flat fee
Your order will be prepared and delivered directly to your
door the very same day, using our discreet delivery service.
Order In-Store
If you prefer to shop in person, visit our Sheffield
location to browse, purchase, and arrange delivery.
- Pay
in full for your items in-store - Choose
a delivery time and date that suits you best - Our
team will ensure a smooth and convenient handover
Discreet Delivery Promise
We understand the importance of privacy.
- All
our delivery vans are plain and unmarked, with no company
branding - Parcels
are packaged in plain or black wrapping for complete discretion
Delivery Requirements
To ensure everything runs smoothly:
- Customers
must be present at the agreed delivery time - Drivers
cannot wait for extended periods - If
the customer is not available, items will be returned to the store and a £50.00
redelivery fee will apply
Upon
delivery, we will request a order number, name and signature to
confirm receipt
Discreet Shipping
All orders from GSH Retail Ltd are packed securely and shipped in Plain unbranded boxes for your privacy. We understand that discretion is important, so no external markings or product details are visible on the packaging.
Each parcel is also wrapped in durable black film and sealed with fragile tape to ensure both security and protection in transit.
We take great care to make sure your order arrives safely, discreetly, and in perfect condition — every time.
Methods Of Payment
We accept a wide range of secure payment options for your convenience when shopping with GSH Retail LTD
You can pay using:
Visa, Mastercard, American Express, and Discover
Apple Pay, Google Pay, and Shop Pay
PayPal – Fast and secure online checkout with buyer protection
Klarna – Flexible payment options, including Pay in 3 instalments or Pay Later
Clearpay – Split your purchase into four interest-free payments
Weston Union– Supported for international customers
Cash In The Post - This is at your own risk! Please make sure it is signed for, tracked, and insured.
Manual Bank Transfer - Contact a member of staff to organise paying via bank transfer.
All transactions are processed securely through Shopify’s encrypted checkout. Your payment details are never shared directly with us.
Once your order is placed, you’ll receive an order confirmation email, followed by tracking details once your parcel has been dispatched.
Finance Options
We offer flexible finance options to make purchasing easier. You can choose to spread the cost of your order, all three options are interest-free and give you the flexibility to manage your payments in a way that suits you.
PayPal Pay in 3
PayPal Pay in 3 allows you to divide your purchase into three equal interest-free payments over two months. The first payment is made at checkout, followed by two automatic payments each month.
It is available on orders between £30 and £2,000, and approval is completed instantly through your PayPal account. You can view, manage, or make payments easily through the PayPal app or your online account.
Shop Pay
Shop Pay Installments lets customers pay for an order in smaller increments over time.When available, Shop Pay Installments is a great option to help you maximize your budget for orders between the following amounts, depending on your location:
Klarna
Klarna offers two flexible ways to pay. With Pay in 3 instalments, your order total is divided into three equal payments, taken every 30 days with no interest or fees when paid on time. Alternatively, you can choose Pay Later in 30 Days, allowing you to receive your order first and settle the balance within 30 days. Klarna provides instant approval at checkout, and all payments can be managed securely through the Klarna app.
Clearpay
Clearpay lets you spread the cost of your purchase into four equal interest-free payments, taken automatically every two weeks. The first instalment is paid at the time of purchase, and the remaining three are collected automatically over six weeks. Clearpay is available for orders between £30 and £1,000 and can be managed easily through the Clearpay app.
Important Information
All finance options are subject to eligibility and approval by the provider. Late or missed payments may affect your credit score, so please ensure funds are available when payments are due. For details about eligibility, limits, or payment schedules, please refer to the provider’s website or app.
Earning Points & Rewards
At GSH Retail we believe loyalty should be rewarded - Our Points & Rewards scheme allows you to collect points every time you shop and redeem them for discount codes to use on future purchases.
When you make a purchase through our website, you’ll automatically earn points based on the value of your order. These points are added to your account and can be saved or redeemed whenever you choose. Once you’ve collected enough points, you can exchange them for a unique coupon code that can be applied at checkout to reduce the cost of your next order.
Earn 5 Points for every £1 spent
Redeem 100 Points for £1 Store Credit
Your points never expire as long as your account remains active, and you can track your balance easily through your customer account dashboard. It’s our way of saying thank you for choosing GSH Retail Ltd
To redeem your points, simply log into your account, view your available balance, and follow the on-screen instructions to generate a discount code. Enter the code at checkout to instantly apply your reward.
Gold Label Ultra PK – Advanced PK Booster for Explosive Flower Development
Gold Label Ultra PK is a professional flowering additive designed to maximise bloom production, optimise nutrient balance, and support larger, denser flowers throughout the flowering stage. Formulated with advanced polyphosphates and chelated trace elements, Ultra PK helps plants absorb phosphorus and potassium more efficiently while maintaining optimal nutrient availability within the root zone.
Suitable for use in soil, coco coir, hydroponics, and all irrigation systems, Gold Label Ultra PK enhances flowering performance while helping maintain cleaner nutrient systems and healthier overall plant development.
Promotes Larger & Denser Flowers
Phosphorus and potassium are two of the most important nutrients required during flowering. Gold Label Ultra PK delivers a highly available PK boost that supports explosive flower formation, improved bloom density, and stronger flowering performance throughout the bloom cycle.
The balanced formula helps plants direct more energy into flower production for increased harvest potential and improved crop quality.
Advanced Polyphosphate Technology
Ultra PK is formulated using advanced polyphosphates designed to improve phosphorus stability and nutrient efficiency within the nutrient solution.
This advanced formulation helps prevent phosphorus from depositing or becoming unavailable at pH levels above 6.2, allowing plants to continue accessing essential nutrients more effectively throughout flowering.
Improves Calcium, Magnesium & Trace Element Availability
By maintaining nutrient stability within the solution, Gold Label Ultra PK helps improve the availability of calcium, magnesium, and essential trace elements.
This balanced nutrient availability supports healthier plant metabolism, stronger flowering development, and improved overall crop performance during periods of high nutrient demand.
Keeps Drip Lines & Irrigation Systems Cleaner
Ultra PK has been specifically designed to reduce nutrient precipitation and minimise the risk of nutrient build-up within irrigation systems and drip lines.
This helps maintain cleaner feeding systems, improved nutrient flow, and more stable nutrient delivery throughout the flowering cycle.
Supports Balanced Flowering Nutrition
Rather than simply increasing phosphorus and potassium levels aggressively, Gold Label Ultra PK has been developed to maintain balanced NPK and micronutrient ratios during both vegetative and flowering development.
This balanced approach helps support healthier plants while reducing the risk of nutrient imbalances and lockouts commonly associated with heavy PK feeding.
Suitable for All Growing Systems
Gold Label Ultra PK performs exceptionally well across a wide range of cultivation methods, including:
- Soil growing
- Coco coir cultivation
- Hydroponic systems
- Recirculating systems
- Run-to-waste systems
- Drip irrigation systems
- Indoor grow rooms and grow tents
- Commercial cultivation setups
Its highly soluble formulation integrates seamlessly into virtually any nutrient programme and feeding schedule.
Highly Concentrated Professional Formula
Gold Label Ultra PK is a highly concentrated additive designed for efficient dosing and professional cultivation performance.
The concentrated formula delivers excellent value while maintaining stable nutrient performance throughout the flowering cycle.
Key Benefits of Gold Label Ultra PK
- Promotes larger and denser flower development
- Advanced polyphosphate PK booster technology
- Improves phosphorus availability at higher pH levels
- Enhances calcium, magnesium, and trace element uptake
- Supports balanced flowering nutrition
- Helps keep drip lines and irrigation systems cleaner
- Improves nutrient stability and efficiency
- Suitable for soil, coco, and hydroponics
- Compatible with all feeding programmes
- Highly concentrated professional-grade formula
How to Use Gold Label Ultra PK
Use Gold Label Ultra PK during the flowering stage alongside your regular base nutrients and bloom feeding programme.
- Recommended dosage: 0.5ml – 1ml per litre of water
Always mix nutrients into water separately and never combine concentrated nutrients directly together. Shake well before use and store at room temperature.
Why Choose Gold Label Ultra PK?
Gold Label Ultra PK is a professional flowering additive designed to maximise bloom performance while maintaining balanced nutrient availability and cleaner feeding systems. By combining advanced polyphosphate technology with chelated trace elements, Ultra PK helps growers achieve healthier flowering plants, improved nutrient efficiency, and larger, higher-quality harvests throughout the flowering cycle.
