If you’ve ever tried growing pumpkins, you know it’s not just about picking seeds and planting them. Choosing the right variety can make a huge difference, especially if your goal is size, speed, or yield. Two popular giants in the pumpkin world are the Polar Bear and Full Moon pumpkins. Both promise big, impressive fruits, but how do they really compare? Let’s dig into their growth habits, care requirements, and speed to help you decide which is best for your garden.

Let’s Understand the Varieties

Before we get into growth speed, it’s helpful to know a bit about these pumpkins.

Polar Bear Pumpkin

The Polar Bear pumpkin is known for its massive size and creamy white color. It’s a favorite among pumpkin enthusiasts who love competitions or want a striking centerpiece for autumn decorations.

Appearance: Large, round, ivory-colored fruit

Average Weight: 40–70 pounds, though some can exceed 100 pounds

Flavor: Mild, sweet, and perfect for baking

Full Moon Pumpkin

The Full Moon pumpkin, as its name suggests, is round and resembles a perfect glowing moon. It’s an orange-skinned giant with impressive potential for both display and cooking.

Appearance: Deep orange, nearly perfectly round

Average Weight: 30–60 pounds, with some reaching 80+ pounds

Flavor: Sweet, dense flesh, great for pies and soups

Growth Cycle Overview

One of the most common questions from gardeners is, “Which one grows faster?” Growth speed depends on several factors, including seed quality, soil, water, and sunlight. However, the genetics of the pumpkin variety also play a crucial role.

Looking at this table, you might notice that the Full Moon pumpkin tends to reach maturity slightly faster than the Polar Bear. From my own personal experience, the difference isn’t huge, but if you’re trying to get your pumpkins ready for an early fall event, that extra 10–15 days can make a noticeable difference.

Germination and Early Growth

Both varieties start as small, delicate seedlings. They need warmth, consistent moisture, and plenty of light.

Polar Bear: The seedlings grow quickly once they sprout, but they’re a bit more sensitive to temperature fluctuations. A sudden cold snap can slow them down considerably.

Full Moon: These are more forgiving in early growth. They tolerate minor temperature changes better and often show steady growth without as much fuss.

A tip I’ve learned is to start seeds indoors about 3–4 weeks before the last expected frost. This ensures that both Polar Bear and Full Moon pumpkins get a head start.

Vine Development and Leaf Growth

Once your seedlings are established, the vines start to stretch. Vines are crucial because they provide the energy needed for those giant fruits.

Polar Bear: Produces long, sprawling vines that need plenty of space. Each vine can easily reach 30 feet. The leaves are large and help shade the developing pumpkin, preventing sunscald.

Full Moon: Slightly shorter vines, but still quite vigorous. The leaves are a bit smaller but denser, which helps protect the fruit from insects and heat.

In my experience, Full Moon pumpkins often reach their peak vine length faster, giving you a quicker canopy cover. This can indirectly help the pumpkin grow faster because the plant is better at photosynthesis early on.

Flowering and Pollination

Flowering is the exciting stage where your pumpkin plant starts preparing to produce fruit. Both varieties produce male and female flowers that need bees or manual pollination.

Polar Bear: Tends to produce flowers a bit later, so you may see fruit set a week after Full Moon.

Full Moon: Flowers appear slightly earlier, and fruit sets quickly.

If you’re timing for a specific event or competition, the Full Moon’s slightly earlier flowering can be an advantage.

Fruit Development and Maturity

Once pollinated, the fruit grows fast—but again, genetics matter.

Polar Bear: Fruits grow steadily, but reaching giant sizes takes patience. You can expect significant size by week 10–12 after pollination.

Full Moon: Fruits reach a harvestable size faster. While they may not get as heavy as the largest Polar Bears, you can usually pick Full Moon pumpkins about 1–2 weeks earlier.

Here’s a rough timeline comparison:

Week 1–2 after pollination: Small fruit sets

Week 3–5: Rapid growth phase (Full Moon often overtakes Polar Bear in relative size)

Week 6–10: Full Moon reaches near-harvestable size; Polar Bear still catching up

Week 11–12+: Polar Bear hits its peak size

Tips to Maximize Growth Speed

Regardless of the pumpkin type, a few strategies can help them grow faster:

Soil Preparation: Rich, loamy soil with compost ensures strong root development.

Consistent Watering: Deep, even watering encourages bigger fruit. Avoid wetting leaves to reduce disease.

Mulching: Retains moisture and keeps soil temperature stable.

Fertilization: High nitrogen early for vine growth, then switch to phosphorus and potassium for fruiting.

Pruning: Remove small secondary fruits to allow the main pumpkin to grow faster.

From my own personal experience, pruning can make a noticeable difference in both Polar Bear and Full Moon pumpkins. The main pumpkin gets more nutrients, and you’ll see faster growth.

Disease and Pest Resistance

Both varieties are relatively hardy, but there are subtle differences:

Polar Bear: Slightly more prone to powdery mildew if humidity is high.

Full Moon: Tolerates minor mildew and insect pressure better.

Choosing the right variety also depends on your local climate and common garden pests.

Space Considerations

Giant pumpkins need space to thrive. Polar Bear vines can take over a large garden plot, so plan accordingly. Full Moon pumpkins are slightly more compact, making them a better choice if your garden space is limited.

Flavor and Use

While growth speed is important, you might also consider what you plan to do with your pumpkins:

Polar Bear: Mild, creamy flesh perfect for soups and baking.

Full Moon: Sweet, dense flesh that holds up well in pies and roasted dishes.

So even if Full Moon grows faster, Polar Bear might be your pick if you’re aiming for culinary perfection or pumpkin contests.

Conclusion: Which Grows Faster?

If your primary concern is speed, the Full Moon pumpkin generally wins. It flowers earlier, sets fruit faster, and reaches harvestable size about 1–2 weeks before Polar Bear.

However, if you’re aiming for size or show-stopping pumpkins, Polar Bear is the champion, though it requires more patience and care.

From my own personal experience, both varieties are incredibly rewarding. If you have the space and time, you could even grow both—enjoying the thrill of watching Full Moon pumpkins appear quickly and the excitement of giant Polar Bears slowly growing into massive masterpieces.