Thompson & Morgan Voucher Codes & Deals for March 2026

1. Find a Thompson & Morgan voucher code on this page and click Copy Code.
2. You’ll be redirected to the Thompson & Morgan website, where you can browse plants, seeds and gardening products.
3. Add the items you want to your basket.
4. When ready, proceed to checkout.
5. Look for the “Do you have a voucher code?” box.
6. Paste your Thompson & Morgan promo code into the box and click Apply.
7. Your discount will be applied before completing payment.

Thompson & Morgan is one of the retailers we often recommend when someone is planning a larger planting project rather than just buying a few individual plants.

One of the reasons is the sheer number of value seed collections and plant bundles available. Instead of buying individual packets, you can often pick up collections designed for borders, vegetable gardens or pollinator-friendly planting, which tend to work out cheaper overall.

Their Special Offers section is also worth checking regularly. We’ve seen deals such as 50% off seed collections or multi-buy plant bundles that make it easier to plant a full bed or border without spending too much.

Another thing we like is the way Thompson & Morgan supports gardeners with advice. Their website includes growing guides, planting advice and seasonal gardening tips, which can help avoid costly mistakes when starting new plants.

One of our team members recently used a clearance offer alongside a voucher code and managed to save over £25 on a mix of vegetable seeds and plug plants, which turned out to be enough to fill an entire raised bed.

As always, before completing your order, we recommend checking NetVoucherCodes first to see if a Thompson & Morgan discount code is available.

Join the Gardening Club

For just £10, get a year’s worth of exclusive savings ^↗, advice, and rewards.

• With this, you can enjoy 10% off every online order for 12 months (automatically applied at checkout), and you'll get £30 in vouchers to use on future orders over £20.
• You’ll also receive access to early-bird offers and new product previews before anyone else.
• Subscribe instead of buying a one-off membership and receive an extra £5 voucher.

Sign Up for the Newsletter

Get 5% off your first order and unlock early access to offers and sales just by subscribing.

• Newsletter members are also the first to hear about new promotions, sales and giveaways and receive personalised gardening offers straight to their inbox.

Shop in the Special Offers Section

Save on everything from seeds to greenhouses by checking the dedicated deals page ^↗ before you check out.

• Access exclusive online-only discounts and find multi-buy offers like 3 for 2 on seeds or 50% off selected plants.
• You can even pick up freebies with certain orders, with no code needed.

Take advantage of seed multi-buy deals

Seed promotions are one of the easiest ways to reduce the cost of planting a garden.

• Thompson & Morgan frequently runs multi-buy offers like 3 for 2 on seeds, which can significantly lower the cost if you’re planting multiple varieties.

Refer friends for extra discounts

If you know someone who also enjoys gardening, the refer-a-friend programme can help both of you save.

• Your friend receives 20% off their first order, and you’ll receive 20% off your next purchase once they’ve placed their order.

Use the Price Promise if you find a cheaper product

If you find the same product cheaper at another retailer, Thompson & Morgan may match the price and refund triple the difference.

• This can be especially helpful when purchasing higher-value items like fruit trees or larger plant collections.

At NetVoucherCodes we highlight the latest Thompson & Morgan voucher codes, seasonal sales and plant promotions to help gardeners save money online.

Common Thompson & Morgan offers

Typical deals available throughout the year include:

• Percentage discounts on seeds and plants
• Multi-buy deals such as 3 for 2 on seeds
• Discounted plant collections
• Seasonal gardening promotions
• Exclusive offers for Gardening Club members

These offers often appear during peak planting seasons, particularly in early spring.

Best times to find Thompson & Morgan deals

The biggest discounts typically appear during:

• Spring planting season
• Summer gardening sales
• Autumn bulb planting promotions
• End-of-season clearance events

Checking for deals during these periods can help reduce the cost of larger planting projects.

How Thompson & Morgan voucher codes work

Most promo codes can be applied at checkout using the voucher code box.

Some codes may require a minimum spend or apply only to certain product categories, so it’s worth checking the terms before placing your order.