diff --git a/app/models/garden.rb b/app/models/garden.rb
index 7987c4dc2..fcbb32ea6 100644
--- a/app/models/garden.rb
+++ b/app/models/garden.rb
@@ -46,7 +46,6 @@ class Garden < ApplicationRecord
   }.freeze
   validates :area_unit, inclusion:   { in:      AREA_UNITS_VALUES.values,
                                        message: "%<value>s is not a valid area unit" },
-                        allow_nil:   true,
                         allow_blank: true
 
   after_validation :cleanup_area
diff --git a/app/models/harvest.rb b/app/models/harvest.rb
index 94b71d7b4..c3ea95b66 100644
--- a/app/models/harvest.rb
+++ b/app/models/harvest.rb
@@ -57,11 +57,11 @@ class Harvest < ApplicationRecord
   validates :quantity, allow_nil: true, numericality: {
     only_integer: false, greater_than_or_equal_to: 0
   }
-  validates :unit, allow_nil: true, allow_blank: true, inclusion: {
+  validates :unit, allow_blank: true, inclusion: {
     in: UNITS_VALUES.values, message: "%<value>s is not a valid unit"
   }
   validates :weight_quantity, allow_nil: true, numericality: { only_integer: false }
-  validates :weight_unit, allow_nil: true, allow_blank: true, inclusion: {
+  validates :weight_unit, allow_blank: true, inclusion: {
     in: WEIGHT_UNITS_VALUES.values, message: "%<value>s is not a valid unit"
   }
   validate :crop_must_match_planting
diff --git a/app/models/planting.rb b/app/models/planting.rb
index 08a78fdd8..9c4a59be5 100644
--- a/app/models/planting.rb
+++ b/app/models/planting.rb
@@ -56,10 +56,10 @@ class Planting < ApplicationRecord
   validates :quantity, allow_nil: true, numericality: {
     only_integer: true, greater_than_or_equal_to: 0
   }
-  validates :sunniness, allow_nil: true, allow_blank: true, inclusion: {
+  validates :sunniness, allow_blank: true, inclusion: {
     in: SUNNINESS_VALUES, message: "%<value>s is not a valid sunniness value"
   }
-  validates :planted_from, allow_nil: true, allow_blank: true, inclusion: {
+  validates :planted_from, allow_blank: true, inclusion: {
     in: PLANTED_FROM_VALUES, message: "%<value>s is not a valid planting method"
   }
 
diff --git a/app/models/seed.rb b/app/models/seed.rb
index 253718039..7c49c9201 100644
--- a/app/models/seed.rb
+++ b/app/models/seed.rb
@@ -29,17 +29,17 @@ class Seed < ApplicationRecord
                                       numericality: { only_integer: true, greater_than_or_equal_to: 0 }
   validates :days_until_maturity_max, allow_nil:    true,
                                       numericality: { only_integer: true, greater_than_or_equal_to: 0 }
-  validates :tradable_to, allow_nil: false, allow_blank: false,
-                          inclusion: { in: TRADABLE_TO_VALUES, message: "You may only trade seed nowhere, "\
+  validates :tradable_to, allow_blank: false,
+                          inclusion:   { in: TRADABLE_TO_VALUES, message: "You may only trade seed nowhere, "\
                                                 "locally, nationally, or internationally" }
-  validates :organic, allow_nil: false, allow_blank: false,
-                      inclusion: { in: ORGANIC_VALUES, message: "You must say whether the seeds "\
+  validates :organic, allow_blank: false,
+                      inclusion:   { in: ORGANIC_VALUES, message: "You must say whether the seeds "\
                                              "are organic or not, or that you don't know" }
-  validates :gmo, allow_nil: false, allow_blank: false,
-                  inclusion: { in: GMO_VALUES, message: "You must say whether the seeds are "\
+  validates :gmo, allow_blank: false,
+                  inclusion:   { in: GMO_VALUES, message: "You must say whether the seeds are "\
                                                         "genetically modified or not, or that you don't know" }
-  validates :heirloom, allow_nil: false, allow_blank: false,
-                       inclusion: { in: HEIRLOOM_VALUES, message: "You must say whether the seeds"\
+  validates :heirloom, allow_blank: false,
+                       inclusion:   { in: HEIRLOOM_VALUES, message: "You must say whether the seeds"\
                                                                   "are heirloom, hybrid, or unknown" }
 
   #