diff --git a/src/crop/cropmodels.jl b/src/crop/cropmodels.jl
index 22d6b1470849aa46b922d82ec930e97018eadfec..8653a1439e8d0a5dcfe14b09c326ef9a4a0a3bad 100644
--- a/src/crop/cropmodels.jl
+++ b/src/crop/cropmodels.jl
@@ -18,7 +18,8 @@ function initcropmodel(cropmodel::AbstractString, cropfile::AbstractString, grow
         Tcroptype = SimpleCrop.CropType
         Tcropstate = SimpleCrop.CropState
         crops_almass = ALMaSS.readcropparameters(cropfile, growthfile)
-        crops = Dict(name => SimpleCrop.CropType(ct.name) for (name, ct) in crops_almass)
+        crops = Dict(name => SimpleCrop.CropType(ct.name, ct.group, ct.minsowdate, ct.maxsowdate)
+                     for (name, ct) in crops_almass)
     else
         error("initcropmodel: no implementation for crop model '$cropmodel'")
     end
diff --git a/src/crop/simplecrop.jl b/src/crop/simplecrop.jl
index 308434d7490b87467b94ea5c58ab316feaaccbe6..348d9448561f693d1e1f951d33b9b7781ea2187a 100644
--- a/src/crop/simplecrop.jl
+++ b/src/crop/simplecrop.jl
@@ -1,6 +1,7 @@
 module SimpleCrop
 
 using Persefone:
+    AnnualDate,
     FarmPlot,
     Length,
     cm,
@@ -14,10 +15,17 @@ import Persefone:
     cropcover,
     cropyield,
     sow!,
-    harvest!
+    harvest!,
+    isharvestable
 
+using Unitful: @u_str
+
+# TODO: alternatively just use ALMaSS.CropType ?
 struct CropType
     name::String
+    group::String
+    minsowdate::Union{Missing,AnnualDate}
+    maxsowdate::Union{Missing,AnnualDate}
 end
 
 cropname(ct::CropType) = ct.name
@@ -64,8 +72,8 @@ function harvest!(cs::CropState, model::SimulationModel)
     # TODO: set cs.croptype ?
     # TODO: this 1.0g/cm/m^2 height_to_yield factor should be a param
     #       for every crop type
-    yield = cs.height * 1.0g/cm/m^2
-    cs.height = 0cm
+    yield = cs.height * 1.0u"g/cm/m^2"
+    cs.height = 5.0cm
     return yield
 end
 
diff --git a/test/crop_tests.jl b/test/crop_tests.jl
index 93e233c49d1386a8afc8e1af0d96b6cba9fb5402..9632b1d59549eea5decd4909982b54e16fce2eb4 100644
--- a/test/crop_tests.jl
+++ b/test/crop_tests.jl
@@ -38,7 +38,7 @@ end
 end
 
 @testset "Submodule SimpleCrop" begin
-    ct = Ps.SimpleCrop.CropType("olive tree")
+    ct = Ps.SimpleCrop.CropType("olive tree", "no_crop_group", AnnualDate(4, 1), AnnualDate(5, 1))
     id = 0
     pixels = [(0, 0)]
     farmer = 0