Elderberry (Sambucus nigra): Flowers, Berries, Preserves and Safe Use

Elder (Sambucus nigra), also called European elder or black elderberry, is a common shrub in Poland. In June it is covered in creamy-white flower heads, and by late summer it hangs heavy with clusters of black berries. For centuries it has found its way into both the kitchen and the home medicine cabinet: the flowers into syrups and cordials, the berries into juices, jams and liqueurs. It does, however, come with an important catch: most parts of the plant are poisonous, and even the raw berries are not fit to eat. Below you will find its botany, its uses and an honest summary of the research. Numbers in square brackets refer to the list of sources at the end.

What it looks like and where it grows

Elder is a shrub or small tree, usually up to 6 m tall and rarely up to 10 m. Its shoots have a soft white pith, its leaves are pinnate with 5–7 leaflets, and older trunks have dark grey, furrowed bark.^[1] The flowers are creamy white, 5–6 mm across, gathered in flat-topped clusters (corymbs) 10–25 cm wide, and they bloom from late spring to midsummer. The fruit is a glossy, dark purple to black berry 3–5 mm across, hanging in drooping clusters; the colour comes from anthocyanins.^[1] The species grows across Europe, the Azores and the Middle East, in scrub, hedgerows, along riverbanks and roadsides, preferring open, nutrient-rich sites. It does not like drought or salty soil.^[1]

In a garden it is valuable for wildlife: its berries are an important food for many birds, especially blackcaps, and its strongly scented flowers attract small insects.^[1] So leave some of the berries for the birds.

Growing elder in the garden

Elder grows in sun and partial shade and on most soils, but does poorly in deep shade and drought. In commercial growing it does best in well-drained, humus-rich, slightly acidic soil (pH 6.0–6.5), and it is propagated from hardwood cuttings of one-year-old shoots. A garden shrub needs little pruning; a neglected one can be cut back hard in late winter or early spring. In commercial orchards, shoots older than three years are removed because their yield drops.^[1] The shrub can be affected by fungi, including jelly ear (Auricularia auricula-judae).^[1]

What is edible and what is poisonous

This is the most important section of this article.

• The flowers and the ripe berries are the only parts considered edible.^[1]
• The leaves, bark, stems, unripe berries and seeds contain cyanogenic glycosides (mainly sambunigrin). According to Wikipedia, all parts of the plant except the flowers and ripe berries are poisonous.^[1]
• Raw berries can cause nausea, vomiting and severe diarrhoea. The US National Center for Complementary and Integrative Health (NCCIH) notes that raw or unripe berries, leaves and stems contain substances that release cyanide, and that cooking destroys them; eating large amounts can still lead to serious illness.^[2]

The practical takeaway: always cook the berries, strip them from the stalks, and never add leaves or stems to your preserves. When picking flowers, cut off only the flower heads.

In the kitchen

Flowers

Elderflowers are picked when fully open. AI-generated image (Gemini).

Elderflowers are used for syrups and cordials (diluted with water), liqueurs, light sparkling drinks, and the whole flower heads can be dipped in batter and fried as fritters.^[1] Pick them on a dry, sunny day, away from roads, and do not wash them – just shake off any insects.

Berries

Cooked elderberries are good for jams, jellies, chutneys, sauces, soups (such as the German Fliederbeersuppe) and wine.^[1]

Simple elderberry syrup

Ingredients: 1 kg ripe elderberries, 1 kg sugar, 500 ml water, juice of 1 lemon.

1. Wash the berries, strip them from the twigs and stalks, then simmer them in the water for 15–20 minutes.
2. Strain through cheesecloth to get clear juice.
3. Add the sugar and lemon juice and simmer over a low heat until the syrup thickens slightly.
4. Pour the hot syrup into sterilised bottles and seal tightly.
5. Store in a cool place and serve diluted with water or stirred into tea.

Health: what we actually know

Elder is widely used in folk medicine and in supplements, but it is worth separating tradition from data:

• Wikipedia states plainly that there is no high-quality clinical evidence on the effectiveness or safety of elderflower or elderberry extracts for treating any disease.^[1]
• NCCIH: a small number of studies suggest that elderberry may relieve symptoms of colds, flu and other upper respiratory infections, but there is not enough evidence for other uses, and nothing supports its use against COVID-19.^[2]
• A meta-analysis by Hawkins et al. (2019) included only 4 studies with 180 participants in total. It found a shorter duration of symptoms, more pronounced for flu than for colds, but the authors caution that only one study looked at the common cold, so the conclusions should be treated with care.^[3]

You will also find claims online that elder is a diuretic or a laxative, or a rich source of vitamins. I could not confirm these in reliable sources, so I have left them out. Treat elder as a tasty preserve, not as a medicine.

Contraindications and precautions

• Do not eat raw berries or any part of the plant other than the flowers and ripe, cooked berries.
• Elder products are not recommended for pregnant women, people with allergies or people with digestive disorders.^[1] Little is known about their safety during pregnancy and breastfeeding.^[2]
• They may interact with prescription medicines, so talk to your doctor before taking supplements.^[1][2]
• Supplements are not tested for effectiveness before they go on sale, so product quality varies.^[2]

Summary

Elder is a useful shrub for both garden and kitchen: flowers for syrups and cordials, cooked berries for juices and jams, and food for the birds. Remember that only the flowers and the ripe, cooked berries are edible. The evidence for medicinal benefits is limited, so it is no substitute for medical treatment.

Sources

1. Wikipedia: Sambucus nigra.
2. NCCIH (National Institutes of Health): Elderberry.
3. Hawkins J. et al. (2019). Black elderberry (Sambucus nigra) supplementation effectively treats upper respiratory symptoms: a meta-analysis of randomized, controlled clinical trials. Complementary Therapies in Medicine 42: 361–365. Summary: Nutritional Outlook.

This article is for information only and is not a substitute for medical advice. It was originally written in Polish and translated for English-speaking readers.

---

This article comes from my blog Laboratorium Natury (“Nature Lab”), where I write about my garden plot in Poland and a more self-sufficient life. Full version with photos: https://jaworznia.pl/en/2026/10/28/elderberry-sambucus-nigra-flowers-berries-safe-use/