Linden
In short
Summary of findings for quick reference
Linden flower tea has a long history in European home medicine. This entry covers the flower clusters of small-leaved lime, large-leaved lime and their hybrid. Historical uses of leaves, bark or wood do not establish the same use. The sources cited here also do not substantiate medieval monastery use of the flower tea.
The EMA describes two traditional indications: common cold symptoms and mild symptoms of mental stress. This assessment rests on long-standing use rather than sufficient clinical proof of efficacy. Findings from tea blends cannot automatically be attributed to linden flowers alone.
For colds, the EMA monograph allows traditional use of linden flower tea from age four; for mild mental stress, from age twelve. The quantity depends on age; see Dosage. Medicinal use during pregnancy and breastfeeding is not recommended because adequate safety data are lacking.
Clinical evidence ↔ Historical significanceWe display two separate evidence categories: clinical evidence from modern trials and historical significance from documented healing tradition. Both are valuable, but they answer different questions.Read more
In every encyclopedia entry we evaluate two distinct categories of evidence. Clinical evidence as used in trials meets a narrower but scientifically essential bar. At the same time, the hundreds of thousands of plant species worldwide have only partially been captured and tested in modern studies.
Alongside the trial picture our researchers compile a comprehensive overview of where and since when a plant has been used across different traditions of natural medicine. When a plant has been used as a medicinal plant in many cultures across many generations, that historical significance deserves to be visible too.
Our position: a truly informative overview emerges only when both categories sit side by side. We communicate transparently what counts as what.
Overview
Linden flower tea is a familiar traditional remedy for cold symptoms. Its pale summer flowers have a sweet honey scent. The medicinal material consists of the flower clusters, including their long pale bract, from Tilia cordata, Tilia platyphyllos and their hybrid Tilia x vulgaris. The EMA monograph covers traditional use for common cold symptoms and mild symptoms of mental stress.
In Austria and across the German-speaking world, linden flower tea is part of traditional home care for colds. This long history does not replace reliable human studies. It remains insufficiently established clinically whether linden flowers shorten a cold or noticeably relieve its symptoms. A comfortably warm cup and rest may nevertheless feel soothing.
History
Lindens are familiar trees of European village squares, parks and avenues, and individual trees can live for several centuries. Theophrastus described the tree in antiquity. The passages consulted here discuss wood and bast, the fibrous inner bark; they do not document linden flower tea for colds.
Early mentions of the tree do not establish the history of flower tea. Writing in 1938, Gerhard Madaus explicitly states that the sixteenth-century herbals he cites did not describe medicinal effects of the flowers. His account of contemporary practice does document flower tea for colds and cough. The EMA monograph adopted in 2012 covers common cold symptoms and mild mental stress as traditional indications.
Mechanism
Linden flowers contain water-binding mucilage, flavonoids and a small amount of aromatic essential oil. In an ex vivo experiment, polysaccharides from Tilia cordata showed moderate adhesion to porcine buccal membranes. This suggests a possible protective-film mechanism, but does not demonstrate relief of throat symptoms in people.
Linden flower tea has traditionally also been taken to promote sweating during colds. The contribution of its individual constituents is insufficiently established. Warmth, aroma and rest can also shape the experience of drinking tea, without demonstrating an effect on the course of a cold.
Clinical data are insufficient to establish efficacy for the indications discussed here. The EMA monograph therefore rests on long-standing traditional use. It supports registration of relevant medicinal products and is not itself a product authorisation. A review of newer literature in 2022 did not lead to revision of the monograph.
Laboratory findings help explore possible mechanisms, but do not show whether linden flower tea noticeably relieves symptoms in everyday use. Its long tradition for colds is documented; this does not establish that it shortens the illness.
Usage
Forms and preparation
For adults and adolescents aged twelve and over, infuse 1.5 g of dried, comminuted linden flowers in 150 ml boiling water. Cover, steep for about ten minutes, then strain and allow to cool to a comfortable drinking temperature. Children require the smaller quantities under Dosage. Follow the leaflet of a finished medicinal tea. If desired, sweeten the slightly cooled tea with linden flower honey. The medicinal quantities given here apply to dried flowers and cannot be transferred unchanged to fresh flowers. Tinctures also vary in composition; use an appropriately labelled preparation and follow its dosage instructions.
Dosage
For adults and adolescents aged twelve and over, the EMA specifies 1.5 g linden flowers in 150 ml water, two to four times daily, totalling 3 to 6 g daily. This traditional dose applies to both common cold symptoms and mild mental stress. It cannot be transferred to tinctures. For children aged four to under twelve, the EMA specifies 1 g flowers in 150 ml water, two to four times daily, for colds only. Use for colds below age four, and for mild mental stress below age twelve, is not recommended because adequate data are lacking. Seek medical advice if cold symptoms persist beyond one week or mental stress persists during use.
Safety
Look-alikes
Similar plants and look-alikes
Tilia tomentosa (Silberlinde)
Silver linden (Tilia tomentosa) has silvery-white hairy leaf undersides. Its flowers are not covered by the EMA linden flower monograph used here. For this tea, use only confidently identified T. cordata, T. platyphyllos or their covered hybrid.
Aesculus hippocastanum (Rosskastanie)
Horse chestnut is also a large park and avenue tree. Its leaves consist of five to seven leaflets radiating from one point, whereas linden has single heart-shaped leaves. Raw horse chestnut flowers, seeds, leaves and bark contain a toxic component and must not be used as a substitute for linden flower tea.
FAQs
Can I harvest linden flowers myself?
Yes, if you can identify the tree confidently. Flowering falls in June or July depending on species, location and weather. Gather newly opened flower clusters on a dry day after the dew has lifted, away from busy roads. Spread thinly in airy shade and store in a closed container away from light only once fully dry.
How should I prepare linden tea with honey?
For adults and adolescents aged twelve and over, use 1.5 g dried linden flowers in 150 ml boiling water. Cover, steep for about ten minutes and strain. Add a little linden flower honey once comfortably warm. For children, follow the age and quantity limits under Dosage. Never give honey to children under one year.
How do I store dried linden flowers?
Keep fully dried flowers tightly closed in a dry, cool place away from light, such as a cupboard away from the cooker and sun. Light and warmth hasten loss of aroma. Replacing the stock by the next flower harvest is a rough traditional guide; follow the expiry information on purchased products.
Summer linden or winter linden, what is the difference?
Tilia cordata is the small-leaved or winter linden, and Tilia platyphyllos the large-leaved or summer linden. The latter usually has larger leaves and flowers earlier. The EMA monograph covers both and their hybrid Tilia x vulgaris, also known by the accepted name Tilia × europaea. It allows the species separately or in mixtures for the same traditional indications.
4 sources.
- Committee on Herbal Medicinal Products (HMPC), European Medicines Agency. Community herbal monograph on Tilia cordata Miller, Tilia platyphyllos Scop., Tilia x vulgaris Heyne or their mixtures, flos. 2012. Source
- European Medicines Agency, Committee on Herbal Medicinal Products (HMPC). Addendum to Assessment report on Tilia cordata Miller, Tilia platyphyllos Scop., Tilia x vulgaris Heyne, flos. 2022. Source
- J. Schmidgall; E. Schnetz; A. Hensel. Evidence for bioadhesive effects of polysaccharides and polysaccharide-containing herbs in an ex vivo bioadhesion assay on buccal membranes. 2000. doi:10.1055/s-2000-11118
- Botanical Society of Scotland. Plant of the Week, 12th October: Lime or Linden (Tilia). 2020. Source
Legal notice: The depiction of historical significance and traditional use is context within our encyclopedia and not a health claim for any product, not a treatment promise, and not a substitute for medical advice. What may be stated on product labels, product pages, or in advertising is governed by the applicable legal requirements.