From invasive root systems to aggressive self-seeding, I will share why urban gardeners should Avoid Planting these in the Ground. These 15 Fruit Trees & Edible Plants can take over your garden, damage nearby structures, or require constant maintenance. Planting fruit trees and edible plants in the ground might seem like the best way to grow them, but some plants can quickly become a headache in urban gardens!
If you have limited space or an urban garden, this will be important info to know BEFORE you plant these in the ground! In this post, I’ll explain why these plants are better suited for containers, raised beds, or controlled areas, helping you avoid common gardening mistakes.
Fig Trees
Figs are delicious and easy to grow, but their strong root systems can cause major problems. They have the potential to damage pavers, concrete, and even underground drains as they search for water. If planted in raised beds, they can take over the space, outcompeting other plants.
A better option? Grow figs in a pot. This allows them to focus on fruit production rather than excessive growth. You may find they fruit quicker and more prolifically in a pot when they focus more on fruit production than on establishing their size. If you have plenty of space, you can plant them in the ground—just keep them away from structures, driveways, and pipes.
Kumquat Trees
Kumquats are a fun citrus tree, but for many gardeners, they end up being more ornamental than practical. While they produce masses of fruit, the small, tart fruits are best suited for jams, chutneys, or cocktails—not for everyday snacking.
A small potted tree will be much easier to manage and will give you great harvests to experiment with. Rather than a full-sized tree overloaded with fruit that becomes a chore to harvest.
Blackberry
Blackberries are known for their invasive growth habits. They send suckers underground, making them hard to contain, and if their stems bend over and touch the ground, they root and spread even further.
To keep them under control, grow blackberries in containers or install a deep garden edge to prevent runners from escaping. Otherwise, they can quickly take over your garden or spread into neighboring gardens or properties.
Blueberry
Blueberries thrive in acidic soil, which can be challenging to maintain in the ground. Without consistent soil pH, they may struggle to produce fruit.
Growing blueberries in pots allows you to control soil acidity, ensuring healthier plants and bigger harvests. Plus, container-grown blueberries take up less space and can be moved easily.
Grafted Passionfruit
Grafted passionfruit vines are notorious for causing problems in the garden, especially for beginner gardeners. The rootstock can take over, killing off the main plant and leaving behind a non-fruiting, invasive vine. The suckers can spread over 50 meters, making them extremely difficult to remove once established.
For a hassle-free option, grow non-grafted passionfruit vines to avoid rootstock takeover.
Mint
Mint is one of the worst plants for spreading aggressively. It sends out underground runners that allow it to jump containment and take over nearby garden beds. Even in pots, it can escape through drainage holes and establish itself in the soil.
Since a single plant can produce more than enough for home use, keep mint contained in a pot or raised bed to prevent it from becoming invasive.
Elderberry
Elderberry bushes are great for their medicinal berries and flowers, but they send out suckers that make them difficult to control. Even if you try to remove them, they can keep coming back for years.
If you’re growing elderberries in a small space, consider pots or designated garden areas to manage their spread.
Goji Berry
Goji berries grow fast and aggressively, spreading through self-seeding and suckering. While they are packed with nutrients, they can quickly take over garden beds if not regularly pruned.
For better control, grow goji berries in a pot to keep them manageable.
Jerusalem Artichoke (Sunchoke)
Jerusalem artichokes send out underground tubers that spread rapidly and uncontrollably. Once established, they are nearly impossible to remove.
To prevent them from taking over, grow sunchokes in large containers or contained garden beds where they can be harvested easily.
Yarrow
Yarrow is a fantastic medicinal herb. It also attracts a lot of beneficial insects and pollinators to the garden. However, it has an aggressive spreading growth habit in the garden. It spreads through runners under the ground that can invade neighboring properties and garden beds. Yarrow can be hard to get rid of once a patch is established.
If you want to grow Yarrow in an urban garden, try containers or root barriers to keep it in check.
Malabar Spinach
This fast-growing vine can take over trellises and nearby plants. It also self-seeds aggressively, meaning it will pop up all over your garden. It is also more ornamental than edible so you don’t need to have it regrowing everywhere.
For better management, grow it in containers or a dedicated trellis space.
Lemon Balm
Lemon balm is one of my FAVOURITE herbs. It is part of the mint family and spreads rapidly through self-seeding. Once established, it can take over veggie patches.
Keep it pruned to stop flowering and contained by growing it in pots rather than directly in the ground.
Choko (Chayote Vine)
Chayote vines are a great perennial vine but do grow extremely fast, climbing over fences, trees, and garden beds. They also regrow from tuberous roots, making them hard to remove once established.
To prevent it from taking over, grow choko in containers or on a dedicated trellis.
Loquat
Loquats are delicious, but birds spread their seeds, causing them to self-sow aggressively. These trees also grow large, shading out other plants and taking up valuable space.
If you plant a loquat tree, be prepared for regular pruning and fruit netting.
Nasturtium
While nasturtiums are great companion plants, they self-seed aggressively and can quickly take over garden beds. In warm climates, they may become invasive.
To keep them in check, grow nasturtiums in pots or confined spaces.
Where & How to Plant Instead:
1. Large Pots & Containers 🪴
- Great for invasive trees like figs, bamboo, or mulberries.
- Controls root spread and makes maintenance easier.
- Use at least a 50L (13-gallon) pot with good drainage.
2. Raised Garden Beds 🌱
- Ideal for shallow-rooted plants that need better soil structure.
- Prevents aggressive roots from spreading into pathways or damaging pipes.
- Use deep beds (40cm/16” or more) for trees like bananas or certain berry bushes.
3. Root Barrier Systems 🚧
- Works well for trees with aggressive or spreading roots (e.g., willows, mulberries).
- Install a thick plastic or metal barrier at least 60cm (24”) deep around the root zone.
4. Espalier Against a Fence or Trellis 🌿
- Perfect for space-saving and controlling growth (e.g., citrus, apples, pears).
- Improves air circulation and prevents disease.
- Train branches horizontally along wires or a fence.
5. Food Forest or Dedicated Zone 🌳
- Some trees, like guavas or loquats, spread but work well in food forests.
- Plant in designated areas where spreading isn’t an issue.
- Use companion planting to balance growth and improve soil health.
6. Grow Bags or Air-Pruning Pots 🛍️
- Good for trees like figs or pomegranates that do well in restricted root spaces.
- Promotes healthy root structure and prevents circling roots.
- Use 40L+ fabric pots for long-term growth.
Planting in the ground
While these plants can all be great additions to your garden, planting them directly in the ground can lead to maintenance headaches and invasive growth. By growing them in containers or designated areas, you can still enjoy their benefits without the stress of keeping them under control.
Have you had trouble with any of these plants? Leave a comment below and share your experience! Don’t forget to subscribe to my YouTube channel for more gardening tips. 🌱
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Happy gardening!
Holly 🌿
