Pumpkin 'Matt's Monster'

Half-hardy Annual

What is Half-Hardy Annual?
A plant that completes its entire life cycle (growth, reproduction, death) in one season.
Can be grown outdoors but requires winter protection from frosts and temperatures below 0C.


Grow a whopper!

Enter your pumpkin into the T&M sponsored Autumn Pumpkin Festival

Seed from award-winning 95 stone (605kg) giant pumpkin

Choose available pack sizes:

Out of Stock

Want to get notified when back in stock?

Watch our Video

Half-hardy Annual

kitchen garden

Full sun

Sowing Months Flowering Months Harvest Months

You May Also Like

New Garden Grow Wooden Cold Frame

Garden Grow Wooden Cold Frame

38 Reviews
More Info


Garden Grow Garden Cloche

Garden Grow Garden Cloche

1 Review
More Info


Green Garden Grow Planter

38 Reviews
More Info

2 Options From£19.99

Garden Grow 4-Vent Aluminium Cold Frame

Seed Sower

13 Reviews
Quick Buy


Black Garden Grow Planter

61 Reviews
More Info

2 Options From£19.99

Best Buy Lime Garden Grow Planter

Lime Garden Grow Planter

65 Reviews
More Info


Garden Gear Heated Propagator

0 Reviews
Quick Buy


  • Grow a whopper!
  • Seed from award-winning 95 stone (605kg) giant pumpkin
  • Enter your pumpkin into the T&M sponsored Autumn Pumpkin Festival
Be in with a chance of growing a record-breaking giant pumpkin with this seed taken from 'Matt's Monster'! Grown by Matt Oliver, horticulturalist at RHS Hyde Hall, Chelmsford, the heaviest outdoor-grown pumpkin in the UK weighed in at a massive 1,333.8lb - that's 95 stone or 605kg!

Matt grew his giant pumpkin with a seed that Thompson & Morgan famously purchased for a whopping £1,250 at auction. The seed came from the then heaviest pumpkin in the world, which weighed 2,323lb (166 stone) grown by Beni Meier from Switzerland in 2014. After the official weigh-in, and many photographs later, Matt decided to hollow out the giant pumpkin, turning it into a 'boat' and he then rowed it across the lake at RHS Hyde Hall!

Thompson & Morgan has designated April 12th 2017 Pumpkin Sowing Day. So order your 'Matt's Monster' pumpkin seed and sow them on or around this date for optimum results.

Did you know? The world's heaviest pumpkin which beat Mr Meier's 2014 record weighed 2,624.6 (1,190.49kg) when it was authenticated by the Great Pumpkin Commonwealth (GPC) Germany on 9th October 2016. It was grown by Mathias Willemijns of Belgium.

Useful links:

How to grow giant pumpkins

Culinary note: Some parts of these flowers are edible. For more details about edible flowers click here.

1 packet (3 pumpkin seeds) (TM78011)


Sow pumpkin seed indoors from April to May for transplanting later on. Sow pumpkins seeds on their sides in small 7.5cm (3") pots of seed compost at a depth of about 2.5cm (1"). Place in a propagator or seal pots inside a plastic bag at a temperature of 20-25C (68-77F) until germination which takes 5-7 days. Do not exclude light, as this helps germination. Once germinated, grow pumpkins on in cooler conditions until all risk of frost has passed and pumpkin plants are large enough to be transplanted outdoors. Gradually acclimatise them to outdoor conditions over 7 - 10 days before planting pumpkins outdoors in warm, well drained, humus rich soil in full sun, with shelter from winds. Choose a spot that receives at least 6 hours of direct sun per day.

Alternatively direct sow pumpkins outdoors from late May to June at a depth of 2.5cm (1") and a distance of 2m (6 1/2')- 3m (10') apart depending on the variety. Sow 2 seeds per hole and thin out the weakest seedling per station after germination.

More Info

Feed and water pumpkins regularly. When growing pumpkins, a thick mulch of organic matter spread around the plants will help to conserve moisture at the roots. Hoe between plants regularly to prevent weeds from establishing. Pumpkins will begin to produce long stems which can be trained in a circle around the plant to prevent them spreading too far.

Leave pumpkins on the plant for as long as possible until the skin has hardened and the fruits start to crack near to the stem. Harvest pumpkins before the first frosts by cutting each fruit from the stem leaving several inches of the stem attached.


Seeds and garden supplies will normally be delivered within the time period stated against each product as detailed above. Plants, bulbs, corms, tubers, shrubs, trees, potatoes, etc. are delivered at the appropriate time for planting or potting on. Delivery times will be stated on the product page above, or in your order acknowledgement page and email.

Orders for packets of seed incur a delivery charge of £2.99.

Orders which include any other products will incur a delivery charge of £4.99.

Where an order includes both packets of seeds and other products, a maximum delivery charge of £6.99 will apply - regardless of the number of items ordered.

Large items may incur a higher delivery charge - this will be displayed in your shopping basket.

Please see our Delivery page for further details, and more information on different charges that may apply to certain destinations.

For more information on how we send your plants please visit our Helpful Guide on plant sizes.




For the chance to be featured, share your plant pictures with us
on Instagram by using the hashtag #YourTMGarden

Join the T&M Gardener's Club


Join the T&M Gardener's Club