Domakihub How to Plant a Walnut Tree and Help It Thrive
From choosing the right spot to the first harvest — a practical guide for Greek gardens and properties.
Reviewed by Domakihub garden pros · 2026-06-23 · 5 min read
A walnut tree is one of the most rewarding long-term plantings you can make on a Greek property — it provides dense shade in summer, a valuable annual crop, and deep roots that handle dry spells well. The video above walks through the hands-on process of planting a bare-root sapling, while this guide covers the full sequence from site selection to first-year care. Whether you manage a private home, a holiday rental with outdoor grounds, or a hotel estate, the steps are the same.
Why Walnut Trees Work Well in Greece
Greece's Mediterranean climate — long warm summers, mild wet winters, and generally well-drained soils — suits the English walnut (Juglans regia) very well. This is the same species grown commercially across Phthiotis and the Peloponnese, and it tolerates both the dry Attic plateau and the cooler northern highlands given enough water in the first two seasons.
Walnut trees are also allelopathic: they release juglone from their roots, which suppresses competing weeds and some nearby plants. This means less maintenance once established, but you should plan what you plant within a five-metre radius carefully — avoid vegetable patches and sensitive ornamentals in that zone.
Bare-Root Sapling vs. Potted Tree vs. Seed
For most property owners, buying a one- or two-year-old bare-root grafted sapling from a Greek nursery is the practical choice. Grafted trees are true to variety, fruit earlier (typically years 4–7), and are easier to transplant than older specimens. Avoid planting from an ungrafted nut you find on the ground — the resulting tree is unpredictable and takes 10–15 years to produce.
Potted saplings transplant well almost year-round in Greece, but bare-root stock must go in the ground between November and early March while the tree is dormant. If you miss that window, wait for a potted specimen rather than forcing a bare-root tree into summer heat.
How to Plant a Walnut Tree: 5 Steps
- 1
Choose a large, sunny, well-drained spot
Walnuts need full sun (at least 6 hours a day) and room to grow — mature trees reach 10–15 metres in height and spread. Allow at least 8 metres from buildings and other large trees. Avoid low-lying areas where water pools after rain, as waterlogged roots rot quickly. A gentle south- or south-west-facing slope is ideal in northern Greece; in Crete or the Cyclades, partial afternoon shade from a wall can help in peak summer.
- 2
Dig the planting hole correctly
Dig a hole at least twice as wide as the root ball and deep enough so the graft union sits 3–5 cm above the final soil level. Loosen the sides of the hole with a fork rather than leaving smooth walls, which can trap roots in a circle. In heavy clay soils common around Thessaly, mix the excavated soil 50/50 with coarse sand or perlite before back-filling to improve drainage.
- 3
Prepare and position the sapling
For bare-root trees, trim any damaged or broken roots cleanly with sharp secateurs. Soak the roots in a bucket of water for 30–60 minutes before planting to rehydrate them. Position the tree upright in the centre of the hole, spread the roots outward naturally — never fold or force them — and back-fill in stages, firming the soil gently with your foot every 10–15 cm to eliminate air pockets.
- 4
Water deeply and mulch
Once planted, water slowly and thoroughly until the soil is saturated to the bottom of the hole. In the first year, water young trees every 10–14 days during dry periods (roughly April through October in most of Greece), giving around 20–30 litres per session. Lay a 10 cm layer of wood chip or straw mulch in a 60 cm circle around the trunk, keeping it 5 cm clear of the bark to prevent rot and deter rodents.
- 5
Stake, protect, and monitor the first season
Drive a sturdy stake into the ground at a slight angle on the prevailing-wind side before back-filling, and tie the trunk loosely with a figure-of-eight rubber tie — tight ties cut into bark. In areas with rabbit or hare pressure (common in rural Crete and the Peloponnese), fit a plastic spiral guard around the base. Check the tie twice a year and loosen it as the trunk thickens. Fertilise lightly in spring of the second year with a balanced NPK granule — hold off in year one to avoid burning young roots.
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FAQ
- When is the best time to plant a walnut tree in Greece?
- Late autumn to early spring (November–February) is ideal for bare-root saplings, when the tree is fully dormant and winter rains help roots establish. Potted saplings can go in the ground almost year-round, but avoid planting during July and August heat unless you can water every few days.
- How long before a grafted walnut tree produces nuts?
- A grafted English walnut sapling typically begins fruiting in years 4–7, depending on variety, soil quality, and how well it is watered in the first two seasons. Ungrafted seedlings take 10–15 years or more. Varieties such as Lara and Chandler, widely available from Greek nurseries, are known for early and heavy cropping.
- Can I plant a walnut tree near my vegetable garden or pool area?
- Keep walnuts at least 5–6 metres from vegetable beds: the roots release juglone, a natural compound that stunts or kills tomatoes, potatoes, peppers, and several other crops. Pool surrounds are also a poor location — falling nuts and husks stain surfaces and clog filters. A corner of open garden or orchard away from terraces and kitchen beds is the best placement.