3 Items You Could Grow Your Giant Pumpkin On (2024)

In this post I’m talking about what should or could go underneath your pumpkin. Something new growers might not think about. At the end I also have the latest video I put together talking about my plants getting eaten, and a problem with my watering setup.

Why would you want to put something underneath your giant pumpkin?

The short answer is to help it. Help it grow more easily, help protect it and help it grow with a flat bottom.

What Items Can You Grow Your Giant Pumpkin On?

It’s interesting reading some of the old giant pumpkin growing books out there. At one point in time polystyrene seemed to be the go to thing to have your pumpkin grow on.

Over time this has fallen out of fashion.

One of the main reasons to have your pumpkin grow on something is to help it grow. To provide as less friction as possible when it is packing on the weight.

Growing Directly on Dirt

Growing directly onto the soil in your patch or area you are growing is the usual thing for new growers.

It makes sense to do this. Pumpkins grow on the ground all the time.

Sure.

But we aren’t talking about normal pumpkins here, we are talking about giants.

Pumpkins that can weigh over 800kg.

Your pumpkins might not get to that weight this growing season. But it is achievable to get to get over 100, 200, 300kg.

With all of that weight pushing down into the soil, it can make it hard for the pumpkin to expand and grow.

And sometimes your pumpkin will weigh light compared to the weight estimation charts.

I’ve experienced this before. Growing straight onto the soil can sometimes result in the pumpkin having a concave bottom. The goal here is to have a nice flat bottom to your pumpkin.

More pumpkin = more weight.

Sand is Your Giant Pumpkins Friend

Having a bed of sand underneath your pumpkin allows it to grow more easily. It makes sense, think about how easy it is to have sand flow through your fingers.

3 Items You Could Grow Your Giant Pumpkin On (1)

It’s made up of many small particles. Allowing less friction than if you were growing directly on soil. It allows water to pass through it and is dries quickly.

Get Washed Sand

While we do have easy access to many beaches around NZ. I’d suggest getting some washed sand. You can pick this up at all the usual places like Bunnings or Mitre 10.

It will be clean, free from random pieces of shell etc and won’t smell.

You will probably need more than you think.

Laying that bed of sand underneath the pumpkin when it is still manageable is the key. Making sure you put enough down at this early stage will reduce potential headaches later on.

What Goes Underneath the Sand

Remember how I mentioned the weight of the pumpkin and the magic of gravity and pull the pumpkin into the patch?

This is where something underneath the sand comes into play.

For some growers this will be a sheet of plywood.

On face value this makes sense. It is sturdy and will deal with the weight of the pumpkin. And a lot of growers will use this.

But I have 2 concerns around this if that is the right word to use.

  • Plywood can be expensive. Just having it lying around under a pumpkin seems crazy to me.
  • It’s completely solid – Water can’t pass through it. What happens if water somehow pools at the base or underneath the pumpkin?

These are just the points that spring to mind. But top growers use this method with no real problems it seems.

Along Came Mill Fabric

I’m not sure what the origin story is of how this started to be used by giant pumpkin growers. But for a few years now growers in the US use this red/orange looking material under their pumpkins.

They call it Mill Fabric.

3 Items You Could Grow Your Giant Pumpkin On (2)

3 Items You Could Grow Your Giant Pumpkin On (3)

It took a while to figure out what it actually is. Turns out it is used in pulp and paper mills.

It’s used when they squish the water out of the wood pulp and after so many days it gets partially clogged with wood fibre and they need to use new pieces of it.

Made from woven pieces of what looks like plastic. This material is super strong, flexible and allows water to pass through it.

This product combined with the sand seems like a good combo. As the pumpkin grows it can easily push the sand when needed along the mill fabric.

You Might Need to Move Your Pumpkin

One thing you might not be aware of or have encountered yet is the need to move your pumpkin.

When your pumpkin is first pollinated on the vine, one of things you need to make sure is that there is enough slack in your vine.

3 Items You Could Grow Your Giant Pumpkin On (4)

When your pumpkin grows, it gets taller. All that height, and growth of the pumpkin can put a massive strain on the vine. Especially where it is connected to the pumpkin.

The last thing you want is the pumpkin breaking this connection from the vine. If that happens, no more growth and your season has ended.

Having it on something more solid than soil combine with the bed of sand allows you to move your pumpkin if you need to. This may sound hard to do, and it can be when the pumpkins are getting super heavy.

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Straps, a ratchet or chain block and you can moved your pumpkin the couple of centimeters it needs. The sand allow the pumpkin to slide easily.

Where to Get Mill Fabric From?

I managed to track some down. I’ve taken the massive rolls and worked out the best way to cut this material. It’s a time consuming process.

I’ve got limited stock of mill fabric, get in touch to find out more.

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I wonder if in the future there will a new better item growers will want to be use.

3 Items You Could Grow Your Giant Pumpkin On (7)

Sam

Thanks for checking out this post! I’ve been growing giant pumpkins for over 15 years, mostly in small spaces.

If you found this helpful and want to say thanks, you can buy me a coffee!

3 Items You Could Grow Your Giant Pumpkin On (2024)

FAQs

What do you grow a giant pumpkin on? ›

To protect your pumpkin from rotting, grow it on sand or on mill fabric, which will ensure that water can drain away, says Johnson. Plant seeds indoors in late April and transplant in early May to your garden, advises Harp.

What to put growing pumpkins on? ›

Grow each pumpkin on a 3-foot wide mound of warm, fertile soil that has a pH of 6.0 to 6.8. Improve your native soil by mixing in several inches of aged compost or other rich organic matter. Pumpkins require a lot of water, so it's best to use a soaker hose or drip irrigation. Avoid wetting the leaves.

How do you grow a giant pumpkin with milk? ›

Once the pumpkin plants start to grow, it's time to feed them milk. Mix 1 part milk with 9 parts water in a mason jar. Dip a candle wick in the mixture and place it in the soil near the pumpkin vine. The pumpkin vine will absorb the milk and nutrients from the soil.

What do you put under a giant pumpkin? ›

Before your pumpkin gets too large you will want to place it on something to protect it from rodents, potential rot from the bottom side and to keep the bottom side flat. Many growers use wood or ply wood with sand or landscape fabric on it. Others like to use just plain sand or Styrofoam.

What do pumpkins like to grow? ›

Give Pumpkins Enough Sun and Space

If you're growing pumpkins in small spaces and your only option doesn't offer all-day sun, somewhere that gets at least 6 hours of direct sun a day is suitable. Make sure you have anywhere from 5 to 20 square feet (depending on variety) to allow the plants to vine out.

Do pumpkins grow on vines or bushes? ›

Did you know that pumpkins grow on vines? We see pumpkins each fall, sometimes they are decorated and sometimes used in delicious recipes. But we don't always get to see how pumpkins grow. The pumpkin vine plays an important role in bringing nutrients to the pumpkin itself.

What blocks can pumpkins grow on? ›

Pumpkin seeds can be planted only on farmland, as stems. Over time, a stem grows through several stages [needs testing] and, at its final growth stage, will produce pumpkins on any adjacent dirt, coarse dirt, rooted dirt, grass block, farmland, podzol, mycelium, moss block, mud or muddy mangrove roots.

What cover crops for pumpkin? ›

Spring seeded oat-peas lead to sorghum/hemp in mid-summer and then they establish a rye/vetch cover crop mix in the fall. This sequence is all managed with no-till direct seeding. The following spring, they roll the rye- vetch cover crop in late May or early June to build a mulch layer for pumpkins.

Do coffee grounds help pumpkins grow? ›

Coffee grounds can either be sprinkled directly around the plants or diluted with water and added as a liquid feed. As well as being able to give pumpkins a nitrogen boost, coffee grounds also keep bugs away and can be used as a control method for slugs and snails.

What makes a giant pumpkin? ›

Giant pumpkin cells grow larger than regular pumpkins, and are composed of more water (up to 94%). They also lack genes that stop fruit growth, resulting in continuous expansion. Once pumpkins grow so large, they tend to no longer be round but will flatten out under their own intense weight.

How do you grow big max pumpkin seeds? ›

Space Between Plants: 2–3 seeds every 18″, thin to 1 seedling every 3′ once plants begin to develop. Sow Indoors: 3–4 weeks before average last frost. Sow Outdoors: After any danger of frost has passed. Pumpkin seeds require relatively warm soil to germinate.

How to plant giant pumpkins? ›

Start the seeds indoors in late April/early May in 4”-6” peat pots or other suitable container. You should use an emery board to file the edges of the seed in improve germination. Soak the seeds for approximately 1 hour prior to planting. Plant the seed pointed side down in your planting medium about 3/4”-1” deep.

What do you feed a giant pumpkin plant? ›

A giant pumpkin plants fertiliser needs

Nitrogen helps with leaf, root and vine growth. Phosphorous helps with healthy root growth, fruit setting and development. Potassium helps with fruit growth. If you are on a limited budget, pick a well rounded product and follow it's instructions.

Can pumpkins grow in sand? ›

Pumpkins and squash can be grown successfully on almost any good soil where they will receive full sunlight throughout the day. Sandy soils high in organic matter are best because the soul will warm up fast and drain quickly. If the soil is heavy (clay), it might help to add sand and organic matter.

Can large pumpkins grow on a trellis? ›

No, not all pumpkin varieties are suitable for trellis growing. Look for smaller varieties such as Small Sugar or Jack Be Little, or larger varieties such as Big Max or Cinderella, which have a shape that is well-suited to trellis growing.

How to train giant pumpkin vines? ›

As the main vine and side vines coming off the main grow outwards you can train their direction by placing crossed over bamboo stakes to help keep the vine in place. Only do this to vines that are already flat on the ground. A lot of the time the ends of vines can be raised into the air.

Do giant pumpkins have seeds? ›

Each pumpkin contains approximately 800 seeds. – The Guinness World Record-holding pumpkin that weighs 1,810 1/2 pounds and the Michigan-grown pumpkin that weighs 1,725 pounds were both grown from seeds from the same pumpkin.

Do pumpkins need full sun? ›

More sun yields more pumpkins and bigger pumpkins. At minimum, plant your pumpkins where they'll receive at least six hours of direct, unfiltered sun each day. The other reason that sun is important is because it helps keep the leaves dry. In the early morning, when sun strikes the leaves, it dries the dew quickly.

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