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Pineapple Guava (Mammoth)

Pineapple Guava (Mammoth)

Price range: $39.99 through $229.99

Mammoth is a vigorous, large-growing pineapple guava from New Zealand, valued for its soft, juicy fruit.

  • Grainy-textured fruit with a soft, juicy bite
  • Upright, vigorous growth to about 10 to 12 ft
  • Best fruit set with a second feijoa flowering nearby
  • One of the longest-grown feijoa cultivars, selected in New Zealand

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Ships in 1 to 4 business days from our nursery in Washington state, in a 36 inch box.
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The trees were delivered promptly and they are the biggest, best looking mail-order trees I have seen in a long time. I will be ordering more in the future.

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Thank you so much for these lovely hardy kiwis. They are much bigger than expected. Will be ordering from you again.

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I have been buying from your nursery for years, and hands down your citrus has survived the best out of all of my sources. I have never lost a plant in my colder climate.

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Description

Mammoth is a vigorous, large-growing pineapple guava selected in New Zealand from seedlings of the older cultivar Choiceana. It grows upright to about 10 to 12 ft, one of the bigger feijoas available, and makes a substantial hedge or specimen tree.

The fruit is soft, juicy, and grainy-textured, best on a plant grown with a second, flowering feijoa nearby.

Overview

  • Soft, juicy, grainy-textured fruit
  • Vigorous, upright growth to about 10 to 12 ft
  • Best fruit set with a second feijoa flowering nearby
  • One of the oldest named feijoa cultivars, selected in New Zealand
  • Hardier than it looks; an established plant shrugs off brief single-digit cold

Growing Details

Latin Name: Acca sellowiana (Feijoa sellowiana)
Site and Soil: Full sun to part shade; well-drained soil; tolerates salt spray; site sheltered from wind
Hardiness:Hardy to roughly 10F – mature plants have survived lower
Rootstock: Grafted onto pineapple guava seedling rootstock
Bearing Age: 2 to 3 years after planting
Size at Maturity: 10 to 12 ft – often maintained smaller
Ripening Time: Late season; late October into early November
Pollination: Self-fertile in a loose sense, but self-pollinated fruit is often hollow; plant with a second feijoa
Pests & Diseases: Very resilient; few issues in most climates
Yield: Heavy cropping

Additional Notes

  • Grower’s Insight: Mammoth is one of the most vigorous feijoas to grow; give it room, since a mature plant easily reaches 10 to 12 ft across as well as up.
  • Regional Insight: Feijoas need a long, mild growing season to ripen a full crop, so gardeners in the mildest climates, coastal California, the Gulf Coast, and the Pacific Northwest, see the most reliable harvests.
  • Explore more pineapple guavas in our collection: Pineapple Guavas

Planting & Care

At a Glance – Mammoth Pineapple Guava

  • Sun: Full sun to part shade
  • Soil: Well-drained soil, pH 5.5 to 7.0
  • Water: Even moisture while fruit is sizing
  • Size: Vigorous, upright to 10 to 12 ft – often maintained smaller
  • Pollination: Sets fruit alone, best with a partner
  • Harvest: Late season, late October into early November
  • Hardiness:Roughly 10F – mature plants have survived lower

Planting & Care – Mammoth Pineapple Guava

Site Selection

  • Choose full sun to part shade and shelter from strong wind.
  • Salt spray is tolerated, so coastal sites work well.

Soil Preparation

  • Plant in well-drained soil with a pH of 5.5 to 7.0.
  • Sand through heavy clay is fine as long as it drains.

Planting Instructions

  1. Dig a hole twice the width of the root ball.
  2. Set the plant at the depth it grew in its pot.
  3. Backfill with native soil, water well, and mulch lightly.

Watering & Fertilizing

  • Keep soil evenly moist while fruit is sizing; a dry spell drops fruit.
  • Feed lightly in early spring.

Pollination

  • Mammoth sets some fruit alone, but self-pollinated fruit can be hollow.
  • Plant a second feijoa flowering nearby for a full, sound crop.

Pruning & Training

  • Prune after harvest to shape the plant.
  • Flowers and fruit form on new wood, so avoid heavy winter cuts.

Harvest & Use

  • Harvest runs from late October into early November.
  • Fruit is ripe when it drops or twists free easily.
  • Pick often; flavor keeps improving for a few days after picking.

Cold Care

  • Shelter the first winter or two while the plant establishes.
  • An established, fully dormant plant takes brief single-digit cold.
  • A sudden autumn frost costs the ripening fruit before it harms the plant.

General Tips

  • Very resilient, with few pest or disease problems.
  • Give it room; a mature plant spreads as wide as it grows tall.

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