Unlock Garden Savings: Thompson & Morgan Discount Codes Bring Year-Round Deals for UK Shoppers

Posted on September 21, 2025 | by couponmama

As autumn arrives and the gardening calendar takes on a new rhythm, UK gardeners have even more reason to get excited. Thompson & Morgan, one of the country’s most trusted names in horticulture, is offering a series of active discount codes and promotional deals to help you save on everything from bulbs and shrubs to vegetable seeds and flowering plants.

With a legacy stretching back over 144 years, Thompson & Morgan is not just a retailer — it is a gardening institution. Their long-standing promise of a 100% quality satisfaction guarantee ensures that every seed, shrub, and bulb you order arrives with the same care and expertise that has defined their name for generations.

The great news? Their latest promo codes are valid right through to 31 December 2025, meaning that whether you’re preparing your garden for autumn blooms, winter planting, or next year’s spring colour, you’ll find a deal that suits your budget and gardening ambitions.

Let’s take a month-by-month look at how these codes work, when they can be applied, and what savvy gardeners across the UK can expect to save.

September 2025 – Kickstarting Autumn Planting with Discounts

September is always a busy month for gardeners. As summer fades, there’s still a golden window for planting bulbs, refreshing beds, and introducing shrubs that will thrive in the cooler months. Thompson & Morgan has timed their September offers perfectly to coincide with this transitional gardening period.

Two major discount codes dominate this month:

TM_TAW368W – 10% off Potted Shrubs
TM_TAW355W – 10% off “Looking Good on the Nursery”

Both of these codes are active until 30 September 2025 (3:59 PM PDT), meaning that UK gardeners have the whole month to take advantage of autumn-ready selections. Potted shrubs are particularly popular right now because they can be planted immediately and will settle into the soil ahead of winter. The “Looking Good on the Nursery” range highlights plants that are in peak condition — essentially the best of the best available at the moment.

These two 10% discounts are the perfect September gardening boost, helping shoppers stretch their budgets while stocking up on hardy shrubs and late-season blooms.

October 2025 – Autumn Savings in Full Swing

By October, the garden is shifting toward structural planting and preparation for spring bulbs. While the two early autumn codes expire at the end of September, Thompson & Morgan continues to support gardeners with ongoing site-wide promotions.

One of the standout offers is:

TM_TAW326W – 15% off orders over £60
TM_TAW327W – £20 off when you spend £100+ on flowers, plants, bulbs, seeds, shrubs, and vegetables

These codes, active right through to the end of 2025, are especially appealing in October. Gardeners often place larger orders at this time of year, preparing for spring displays with bulk bulb purchases or investing in structural shrubs. The tiered discounts encourage both modest and substantial orders, ensuring that whether you’re spending £60 or £100, there’s a way to save.

November 2025 – Preparing for Winter with Smart Codes

November might feel like a dormant period for gardens, but savvy UK gardeners know it’s an essential month for preparation. Planting garlic, onions, or broad beans in the autumn gives them a head start for spring harvests. It’s also the right time to order indoor plants and seasonal flowering varieties to brighten up homes as the days get shorter.

Thompson & Morgan’s two big discount codes remain active this month, continuing to give buyers options:

15% off orders over £60 (TM_TAW326W)
£20 off £100+ orders (TM_TAW327W)

The flexibility of these codes is a major win. A gardener looking to experiment with just a few packets of seeds can scale their order up to reach £60 and unlock 15% off. Meanwhile, anyone planning a significant pre-winter purchase — perhaps ordering shrubs and bulbs together — can use the £20 off £100 code.

It’s an opportunity to blend value with preparation, ensuring that your garden is both winter-ready and primed for a burst of growth when spring arrives.

December 2025 – Seasonal Shopping and End-of-Year Bargains

December is a special month for gardeners and gift-givers alike. Many UK shoppers turn to Thompson & Morgan for presents: seed collections, houseplants, and growing kits make thoughtful gifts for loved ones. With Christmas demand at its peak, the timing of the ongoing promo codes couldn’t be better.

The same two long-term codes apply throughout December:

15% off £60+ orders (TM_TAW326W)
£20 off £100+ orders (TM_TAW327W)

Both codes remain active until 31 December 2025 at 3:59 PM PST, meaning that even last-minute shoppers can secure their savings. Whether you’re buying a few seed trays as stocking fillers or investing in a larger package for a gardening enthusiast, Thompson & Morgan ensures that festive purchases come with added value.

The holidays also highlight the company’s 100% Quality Satisfaction Guarantee. Gift-givers can rest assured that their presents will meet the highest horticultural standards — and if not, Thompson & Morgan will make it right.

Ongoing Deals Beyond 2025 – A Legacy of Quality

In addition to the dated discount codes, Thompson & Morgan also carries long-term offers that reinforce their brand identity. These include:

Experts in the Garden for over 144 Years (active until 31 December 2049)
100% Quality Satisfaction Guarantee (active until 31 December 2049)
Seeds for Plants, Fruit and Vegetables (active until 31 December 2049)

These aren’t standard discount codes but rather core values and guarantees that underpin every purchase. For shoppers, they provide an assurance of trust and consistency that goes beyond short-term savings.

Why Thompson & Morgan Promo Codes Matter

Gardening can sometimes feel like an expensive pursuit — particularly if you’re passionate about experimenting with new plants each season. Promo codes offer a way to keep costs under control without sacrificing quality. Thompson & Morgan’s latest promotions are designed to support both small-scale hobbyists and serious gardeners.

Small Orders Benefit Too – Even if you’re only topping up your seed collection or adding a few shrubs, the 10% and 15% discount tiers can provide real value.
Big Projects Save More – For gardeners planning significant landscaping projects, the £20 off £100+ deal is a simple way to reduce upfront costs.
Seasonal Flexibility – By running codes across multiple months, Thompson & Morgan ensures gardeners can access savings whenever they’re ready to buy.

The Bigger Picture: Seasonal Gardening with Savings

Let’s put this into context across the gardening year:

Autumn (September–November): Perfect for planting shrubs, sowing hardy vegetables, and ordering bulbs for spring. Promo codes help reduce costs during one of the busiest gardening seasons.
Winter (December): An ideal time to buy gifts, stock up on seeds, and plan your spring planting strategy. Codes ensure holiday purchases come with value.
Spring 2026 Onward: While the current dated codes run only until the end of 2025, Thompson & Morgan’s long-term deals and satisfaction guarantee continue to assure customers that every purchase is backed by expertise.

Customer Trust and Long-Term Benefits

Shoppers in the UK turn to Thompson & Morgan not just for variety but for peace of mind. The quality guarantee means that even if your seeds or plants don’t perform as expected, you’ll have the support of a company that has been perfecting horticultural supply since the late 19th century.

In addition, by encouraging larger orders through tiered discounts, Thompson & Morgan ensures customers can maximise both their gardening potential and their savings. It’s a balanced approach that rewards loyalty and smart shopping.

Final Thoughts – A Year of Gardening Value

As 2025 unfolds, the combination of seasonal gardening opportunities and Thompson & Morgan’s discount codes offers a compelling opportunity for UK gardeners. From the practical savings of September’s shrub discounts to the festive value of December’s gift-friendly codes, there is a promotion for every occasion.

Thompson & Morgan has successfully combined tradition with modern savings strategies. Their 144-year reputation for quality is enhanced, not diminished, by the digital convenience of promo codes. This fusion of heritage and innovation makes them one of the standout names in UK gardening retail.

Key Codes Recap (Valid Until 31 December 2025):

TM_TAW368W – 10% off Potted Shrubs (expires 30 September 2025)
TM_TAW355W – 10% off “Looking Good on the Nursery” (expires 30 September 2025)
TM_TAW326W – 15% off £60+ orders (expires 31 December 2025)
TM_TAW327W – £20 off £100+ orders (expires 31 December 2025)

With these in hand, gardeners can confidently plan, plant, and save throughout the remainder of 2025.