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Pumpkin Growing Guide

5 Steps to Pumpkin Success

  • Choose a sunny area of the garden with enough space for plants to spread.
  • Prepare your soil with organic matter like compost and sheep pellets.
  • Add a layer of vegetable mix to plant into. Pumpkins are best planted in spring once frosts have passed. 
  • Feed every four weeks during spring and summer with vegetable food.
  • Keep your pumpkins well-watered as they establish and grow, avoiding the leaves.

Follow our full guide below for a bumper crop of homegrown pumpkins.

Tasty, sweet and versatile, pumpkins (or otherwise known as squash) are a crop the whole family can enjoy growing. Pumpkins are happy trailing along the ground. Pumpkin vines can also be trained up a strong fence, tree or trellis to save on space. Pumpkins are easy to grow and will provide even gardening novices with hassle-free success.


If left to their own devices pumpkins will happily scramble almost anywhere, and sometime even sprout up by themselves in the compost heap. Choose a sunny position to plant your pumpkins. If space is an issue, you can grow pumpkins in containers. Choose a smaller-grown variety and a large container and place it in a sunny position.

Pumpkins need a long growing season of approximately four to six months depending on where you live. Plant out as soon as frosts are over and keep well-watered while the plant is establishing itself.

Popular pumpkin varieties include Butternut, Crown, Kumi Kumi, Queensland Blue and Triamble.

Shop Tui Pumpkin Seed - Whangaparoa Crown, a heirloom variety that offers excellent long keeping quality.

If growing from seed, start them off indoors in early spring and plant out once the risk of frost has passed and temperatures are consistently above 15 degrees Celsius. This will be generally the same time you plant tomatoes, cucumber, capsicum, egg plant and other frost tender vegetables. Refer to our Planting Calendar for when to plant pumpkins and squash in your region. 

Allow 2 metres between each plant.


The better the soil, the better your plants will grow. Pumpkins enjoy a rich fertile soil. If you are starting with an existing garden bed dig in organic matter like Tui Sheep Pellets and Tui Compost to your soil. Then you can add a layer of Tui Vegetable Mix.

The best times to plant are early in the morning or late in the day, so the plants aren’t exposed to the hot sun straight away. Always water plants well before and after planting.

Pinch out the main stems once growth starts; this will encourage more lateral stems and give you a heavier crop of fruit. To encourage large pumpkins, allow only two to three to develop on each plant.

Planting in garden beds

  • Water plants thoroughly before planting and allow to drain.
  • Dig a hole, approximately twice the depth and width of the root ball of your plant.
  • Partly fill the hole with Tui Vegetable Mix.
  • Gently loosen the root ball of your plant and position the plant in the centre of the hole.
  • Fill in with Tui Vegetable Mix.
  • Press soil gently around the base of the plant.
  • Water your plant well.


Feed your plants and they will feed you. Pumpkins use nutrients from the soil as they grow, so replenishing the nutrients ensures your plants grow to their full potential. Select a fertiliser specially blended for your crop like Tui Vegetable Food.

Well watered, well nourished pumpkins will have a better chance of keeping insect pests and diseases at bay. Avoid getting the foliage wet when watering. Lift off the ground in some areas if the ground is cold and wet. Mildew can be an issue - control with a suitable fungicide if it becomes an issue.

While your pumpkins are growing regularly apply a dose of Tui Organic Seaweed Plant Tonic to give them a welcome boost.

Remove excess leaves to aid ripening, but don't be tempted to remove too many as this will reduce the amount of photosynthesis.


A general rule is to harvest pumpkins after the first frost. If you live in a mild climate, pick them once they have coloured up and sound hollow when you knock the shell. If the skin of the pumpkin is hard and doesn't leave a dent when knocked, it is ripe. Another indication they are ripe is when the leaves die away.

Cut pumpkins from the vine with a sharp knife, leaving the stem on the fruit. Place in a dark, dry place to store.

Be vigilant and stop unwanted insects and diseases from ruining your plants. Slugs and snails can be an issue - lay Tui Quash slug and snail control around young plants.


When should I plant
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  • Harvest in 110-170 days