Orache (Chenopodiaceae, now part of the family Amaranthaceae) is a group of unremarkable weeds that grow where little else survives — along roadsides, on abandoned land, dumps, and especially on dry and saline soils of coastal areas. Individually they produce little pollen, but where they grow in abundance they become a noticeable, moderate allergen of late summer and autumn.

What plant are we talking about

This group includes white orache / goosefoot (Chenopodium album), various oraches (Atriplex) and halophilic species such as saltwort (Salsola) that love saline, sunny habitats. They are all wind-pollinated and release pollen into the air.

Botanically, they are also related to some vegetables — spinach, chard, and beet — but for allergy sufferers the wild, weedy species matter.

Season

  • from July to October
  • peak in late summer, concurrent with ragweed
  • on coastal soils and dry land the season can be long and drawn out

How strong an allergen

Orache is classified as a moderate allergen. It is weaker than ragweed and grasses, but on habitats where it dominates it can by itself cause clear symptoms, and combined with other weeds it contributes to the overall pollen load of late summer. The main allergen, Che a 1, is well-described in diagnostics.

Symptoms

  • watery nasal discharge and nasal congestion
  • sneezing
  • itching and redness of the eyes
  • itching of the palate and throat
  • in sensitive individuals — worsening of asthma

Cross-reactivity

Cross-sensitivity has been described among species of the Amaranthaceae family and partially with other late-summer weeds. In people sensitive to multiple weeds simultaneously, orache and ragweed together can prolong and intensify autumn symptoms. In coastal areas it often follows crkvina as an inhabitant of similar ruderal habitats.

Diagnosis

  • skin prick tests for orache as part of a weed panel
  • specific IgE blood tests (Che a 1) when skin tests are unreliable
  • symptom diary — symptoms lasting deep into autumn point to weeds like orache and ragweed

What helps

  • Second-generation antihistamines through the late-summer and autumn season
  • Nasal corticosteroid spray for pronounced or long-lasting symptoms
  • Eye drops for allergic conjunctivitis
  • Weed removal around the house before flowering reduces local exposure
  • Ventilation at times of day with lower concentrations, avoid drying laundry outdoors

Note

This is not medical advice. If you suspect you have an allergy to orache pollen or any other pollen, consult your family doctor or allergist. For symptoms lasting into autumn, accurate diagnosis helps distinguish individual weeds and direct therapy.