Thompson & Morgan Mini Plum Black Amber Pot Plant - 9cm

Plum ‘Black Amber’ is a heavy cropping variety producing wonderful dark skinned fruit with a soft,...

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Product Information

Full details

The Thompson & Morgan Mini Plum 'Black Amber' is a compact fruit tree perfect for small gardens, patios, or containers, offering heavy yields of delicious, sweet, dark-skinned plums. This hardy variety allows you to enjoy homegrown fruit even with limited space, though planting another compatible plum variety nearby will optimize its naturally partially self-fertile nature, ensuring an even more bountiful harvest.

All features

Model Part Number10632
BrandThompson & Morgan

Extended Product Information

FAQs

How big will my 'Black Amber' plum tree grow?

When fully established, the 'Black Amber' mini plum tree typically reaches a maximum height of 1 meter (3.3 feet) and a spread of about 60 cm (2 feet). Its compact size makes it perfect for pots or small garden spaces.

How long until my tree produces fruit?

You can expect your 'Black Amber' plum tree to start producing fruit as early as two years after planting, with peak yields anticipated within four years.

Does this plum tree need another tree to pollinate?

The 'Black Amber' plum is classified as partially self-fertile, meaning it can produce fruit on its own. However, for an optimal and heavier fruit set, it is highly recommended to plant another compatible plum variety nearby to assist with cross-pollination.

What kind of soil or compost should I use?

For container planting, use a good quality compost like John Innes No.3. If planting directly into the ground, ensure the soil is well-drained. The tree thrives in a sheltered, sunny position.

When is the best time to plant this plum tree?

This hardy plum tree can be planted any time between January and December, provided the ground is not frozen or waterlogged.

How often should I water and feed my potted plum tree?

Potted plum trees require regular watering to keep the compost consistently moist, especially during dry spells and fruit development. They also benefit from regular feeding with a balanced fruit tree fertilizer throughout the growing season to support healthy growth and fruit production.

How do I prune my 'Black Amber' plum tree?

Pruning starts immediately after planting by removing the central stem above the highest side branch. For the first 3 years, only prune the tips of main branches by one-third in winter to establish a strong framework. From the fourth year, prune out some older sub-branches at their union to encourage new fruiting wood. Detailed instructions are provided in the 'Setup, Compatibility & Care' section.

Troubleshooting

Tree is not producing fruit after two years.

Ensure the tree receives full sun. While 'Black Amber' is partially self-fertile, planting another compatible plum variety nearby can significantly improve pollination and fruit set. Check for proper watering and feeding, as stress can inhibit fruiting. Follow the recommended pruning guide to encourage fruiting wood.

Poor fruit quality or small fruit size.

This can be due to insufficient water or nutrients. Ensure regular feeding with a balanced fruit tree fertilizer and consistent watering, especially during fruit development. Overcropping can also lead to smaller fruit; consider thinning some fruits early in the season to allow remaining fruits to grow larger and healthier.

Leaves turning yellow or dropping prematurely.

Yellowing leaves can indicate overwatering (leading to root rot) or underwatering. Check soil moisture and adjust your watering schedule. Nutrient deficiencies can also cause this; ensure you are using a suitable fertilizer. Poor drainage in containers can also be a cause.

Tree shows signs of pest infestation (e.g., aphids, caterpillars).

Inspect the tree thoroughly to identify the specific pest. For aphids, a strong jet of water or insecticidal soap can be effective. For caterpillars, hand-picking or organic pesticides may be necessary. Ensure good air circulation and plant hygiene to prevent infestations.

Pros and Cons

Pros

  • High yield of sweet, juicy plums.
  • Compact size ideal for small gardens, patios, or containers.
  • Early fruiting, often within two years.
  • Hardy and relatively low-maintenance once established.
  • Versatile fruit for eating fresh, cooking, or preserving.
  • Can be grown in a sheltered, sunny spot or in a large pot.

Cons

  • Requires specific pruning for optimal shape and yield.
  • Though partially self-fertile, planting another plum variety is recommended for best results.
  • Needs regular feeding and watering, especially when containerized.
  • Initial setup requires a good quality compost and a suitable container.
  • Fruit production takes at least two years.

Setup, Compatibility & Care

Setup

Upon arrival, your 'Black Amber' plum tree is supplied in a 9cm nursery pot. To plant, choose a container at least 60cm (2 feet) in diameter or a well-drained, sheltered, sunny spot in your garden.

  1. Container Planting: Fill your chosen container with a high-quality compost, such as John Innes No.3.
  2. Garden Planting: Ensure the soil is well-drained and the location receives full sun.
  3. Planting Depth: Plant the tree at the same soil level as it was in its nursery pot.
  4. Firming & Watering: Gently firm the soil around the base of the tree and water thoroughly immediately after planting.

Compatibility

'Black Amber' plum trees are hardy and compatible with most garden environments that offer full sun. While partially self-fertile, for optimal fruit yield, it is highly recommended to plant another compatible plum variety nearby to assist with cross-pollination.

Care

  • Watering: Water regularly, especially for containerized plants, to keep the soil consistently moist but not waterlogged.
  • Feeding: Feed containerized plants regularly during the growing season with a balanced fruit tree fertilizer.
  • Pruning:
  1. Initial Pruning (After Planting): Remove the central stem just above the highest side branch to encourage a bushy, open structure.
  2. First 3 Years (Winter Pruning): In winter, prune only the tips of the remaining main branches by one-third. Aim to establish about six main branches that will form the tree's framework.
  3. From 4th Year Onwards: To maintain vigor and encourage new fruiting wood, some older sub-branches can be pruned out at the point where they join the main branch. This allows new sub-branches to develop.
  • Pest and Disease Control: Regularly inspect your tree for any signs of pests or diseases and address them promptly. Use appropriate organic or chemical treatments as needed.
  • Winter Protection (Containerized): In very cold climates, consider insulating the pot or moving it to a sheltered location during harsh winter periods.

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