
Comfrey
Symphytum officinale
Harvest (months): IV–V
Processing: Decoction, Herbal oil
Large leaves; alkaloids—internal use needs caution.
DetailsImage source
Photograph on Wikimedia Commons (CC BY 2.5). · Agnieszka Kwiecień ( Nova ) · CC BY 2.5
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Symphytum officinale
Harvest (months): IV–V
Processing: Decoction, Herbal oil
Large leaves; alkaloids—internal use needs caution.
DetailsPhotograph on Wikimedia Commons (CC BY 2.5). · Agnieszka Kwiecień ( Nova ) · CC BY 2.5

Equisetum arvense
Harvest (months): III–IV
Processing: Decoction, Bath additive
Spring horsetail; gather only from clean sites.
DetailsPhotograph on Wikimedia Commons (CC BY 4.0). · botany08 · CC BY 4.0

Sideritis scardica
Harvest (months): VI–VIII
Processing: Decoction, Herbal infusion (tea)
A Greek mountain herb; the dried aerial parts make the traditional 'mountain tea'.
DetailsPhotograph on Wikimedia Commons (Public domain). · Daderot · Public domain

Valeriana officinalis
Harvest (months): V–IX
Processing: Herbal infusion (tea), Decoction
White flower clusters; valerian root in tradition.
DetailsPhotograph on Wikimedia Commons (CC BY-SA 4.0). · Ivar Leidus · CC BY-SA 4.0