Ellenberg - Moisture

The requirements of a species for moisture are summarised by Ellenberg F values (from the German Feuchtigkeit). Unlike the other Ellenberg values, moisture is on a scale of 1 to 12.

 

Ellenberg value

Explanation

1

Indicator of extreme dryness, restricted to soils that often dry out for some time (Corynephorus canescens, Helianthemum apenninum, Koeleria vallesiana)

2

Between 1 and 3 (Clinopodium acinos, Saxifraga tridactylites, Sedum acre)

3

Dry-site indicator, more often found on dry ground than in moist places (Asplenium trichomanes, Centaurea scabiosa, Spergularia rubra)

4

Between 3 and 5 (Arctium minus, Helictotrichon pratense, Iris foetidissima, Thymus polytrichus)

5

Moist-site indicator, mainly on fresh soils of average dampness (Anthriscus sylvestris, Euphorbia amygdaloides, Hyacinthoides non-scripta, Solanum nigrum)

6

Between 5 and 6 (Agrostis stolonifera, Empetrum nigrum, Rumex crispus)

7

Dampness indicator, mainly on constantly moist or damp, but not on wet soils (Carex ovalis, Dactylorhiza maculata, Pulicaria dysenterica, Ranunculus repens)

8

Between 7 and 9 (Cardamine pratensis, Equisetum telmateia, Phalaris arundinacea, Schoenus nigricans)

9

Wet-site indicator, often on water-saturated, badly aerated soils (Drosera rotundifolia, Myosotis scorpioides, Vaccinium oxycoccus, Viola palustris)

10

Indicator of shallow-water sites that may lack standing water for extensive periods (Alisma plantago-aquatica, Carex limosa, Ranunculus lingua, Typha latifolia)

11

Plant rooting under water, but at least for a time exposed above, or plant floating on the surface (Lemna minor, Nuphar lutea, Sagittaria sagittifolia, Schoenoplectus lacustris)

12

Submerged plant, permanently or almost constantly under water (Isoetes lacustris, Potamogeton crispus, Ranunculus circinatus, Zostera marina)