diff --git a/src/wuttafarm/db/model/asset_plant.py b/src/wuttafarm/db/model/asset_plant.py
index 5f10e7c..62f7e9b 100644
--- a/src/wuttafarm/db/model/asset_plant.py
+++ b/src/wuttafarm/db/model/asset_plant.py
@@ -25,6 +25,7 @@ Model definition for Plant Assets
 
 import sqlalchemy as sa
 from sqlalchemy import orm
+from sqlalchemy.ext.associationproxy import association_proxy
 
 from wuttjamaican.db import model
 
@@ -80,6 +81,12 @@ class PlantType(model.Base):
         """,
     )
 
+    _plant_assets = orm.relationship(
+        "PlantAssetPlantType",
+        cascade_backrefs=False,
+        back_populates="plant_type",
+    )
+
     def __str__(self):
         return self.name or ""
 
@@ -99,9 +106,17 @@ class PlantAsset(AssetMixin, model.Base):
 
     _plant_types = orm.relationship(
         "PlantAssetPlantType",
+        cascade="all, delete-orphan",
+        cascade_backrefs=False,
         back_populates="plant_asset",
     )
 
+    plant_types = association_proxy(
+        "_plant_types",
+        "plant_type",
+        creator=lambda pt: PlantAssetPlantType(plant_type=pt),
+    )
+
 
 add_asset_proxies(PlantAsset)
 
@@ -129,4 +144,5 @@ class PlantAssetPlantType(model.Base):
         doc="""
         Reference to the plant type.
         """,
+        back_populates="_plant_assets",
     )
diff --git a/src/wuttafarm/farmos/importing/model.py b/src/wuttafarm/farmos/importing/model.py
index 337649c..04d80c1 100644
--- a/src/wuttafarm/farmos/importing/model.py
+++ b/src/wuttafarm/farmos/importing/model.py
@@ -347,6 +347,12 @@ class LandAssetImporter(ToFarmOSAsset):
         return payload
 
 
+class PlantTypeImporter(ToFarmOSTaxonomy):
+
+    model_title = "PlantType"
+    farmos_taxonomy_type = "plant_type"
+
+
 class PlantAssetImporter(ToFarmOSAsset):
 
     model_title = "PlantAsset"
diff --git a/src/wuttafarm/farmos/importing/wuttafarm.py b/src/wuttafarm/farmos/importing/wuttafarm.py
index a39fe97..bb5350d 100644
--- a/src/wuttafarm/farmos/importing/wuttafarm.py
+++ b/src/wuttafarm/farmos/importing/wuttafarm.py
@@ -99,6 +99,7 @@ class FromWuttaFarmToFarmOS(FromWuttaFarmHandler, ToFarmOSHandler):
         importers["AnimalType"] = AnimalTypeImporter
         importers["AnimalAsset"] = AnimalAssetImporter
         importers["GroupAsset"] = GroupAssetImporter
+        importers["PlantType"] = PlantTypeImporter
         importers["PlantAsset"] = PlantAssetImporter
         importers["Unit"] = UnitImporter
         importers["ActivityLog"] = ActivityLogImporter
@@ -264,6 +265,28 @@ class LandAssetImporter(FromWuttaFarm, farmos_importing.model.LandAssetImporter)
         }
 
 
+class PlantTypeImporter(FromWuttaFarm, farmos_importing.model.PlantTypeImporter):
+    """
+    WuttaFarm → farmOS API exporter for Plant Types
+    """
+
+    source_model_class = model.PlantType
+
+    supported_fields = [
+        "uuid",
+        "name",
+    ]
+
+    drupal_internal_id_field = "drupal_internal__tid"
+
+    def normalize_source_object(self, plant_type):
+        return {
+            "uuid": plant_type.farmos_uuid or self.app.make_true_uuid(),
+            "name": plant_type.name,
+            "_src_object": plant_type,
+        }
+
+
 class PlantAssetImporter(FromWuttaFarm, farmos_importing.model.PlantAssetImporter):
     """
     WuttaFarm → farmOS API exporter for Plant Assets
diff --git a/src/wuttafarm/importing/farmos.py b/src/wuttafarm/importing/farmos.py
index a1e9631..9e922da 100644
--- a/src/wuttafarm/importing/farmos.py
+++ b/src/wuttafarm/importing/farmos.py
@@ -623,7 +623,7 @@ class PlantAssetImporter(AssetImporterBase):
 
     def normalize_source_object(self, plant):
         """ """
-        plant_types = None
+        plant_types = []
         if relationships := plant.get("relationships"):
 
             if plant_type := relationships.get("plant_type"):
@@ -640,7 +640,7 @@ class PlantAssetImporter(AssetImporterBase):
         data.update(
             {
                 "asset_type": "plant",
-                "plant_types": plant_types,
+                "plant_types": set(plant_types),
             }
         )
         return data
@@ -649,7 +649,7 @@ class PlantAssetImporter(AssetImporterBase):
         data = super().normalize_target_object(plant)
 
         if "plant_types" in self.fields:
-            data["plant_types"] = [t.plant_type_uuid for t in plant._plant_types]
+            data["plant_types"] = set([pt.uuid for pt in plant.plant_types])
 
         return data
 
diff --git a/src/wuttafarm/web/forms/schema.py b/src/wuttafarm/web/forms/schema.py
index c6095ff..548ee81 100644
--- a/src/wuttafarm/web/forms/schema.py
+++ b/src/wuttafarm/web/forms/schema.py
@@ -27,6 +27,7 @@ import json
 
 import colander
 
+from wuttaweb.db import Session
 from wuttaweb.forms.schema import ObjectRef, WuttaSet
 from wuttaweb.forms.widgets import NotesWidget
 
@@ -242,13 +243,23 @@ class PlantTypeRefs(WuttaSet):
 
     def serialize(self, node, appstruct):
         if not appstruct:
-            appstruct = []
-        uuids = [u.hex for u in appstruct]
-        return json.dumps(uuids)
+            return colander.null
+
+        return [uuid.hex for uuid in appstruct]
 
     def widget_maker(self, **kwargs):
         from wuttafarm.web.forms.widgets import PlantTypeRefsWidget
 
+        model = self.app.model
+        session = Session()
+
+        if "values" not in kwargs:
+            plant_types = (
+                session.query(model.PlantType).order_by(model.PlantType.name).all()
+            )
+            values = [(pt.uuid.hex, str(pt)) for pt in plant_types]
+            kwargs["values"] = values
+
         return PlantTypeRefsWidget(self.request, **kwargs)
 
 
diff --git a/src/wuttafarm/web/forms/widgets.py b/src/wuttafarm/web/forms/widgets.py
index 7f5808f..ae9aa10 100644
--- a/src/wuttafarm/web/forms/widgets.py
+++ b/src/wuttafarm/web/forms/widgets.py
@@ -26,7 +26,7 @@ Custom form widgets for WuttaFarm
 import json
 
 import colander
-from deform.widget import Widget, SelectWidget
+from deform.widget import Widget, SelectWidget, sequence_types, _normalize_choices
 from webhelpers2.html import HTML, tags
 
 from wuttaweb.forms.widgets import WuttaCheckboxChoiceWidget, ObjectRefWidget
@@ -258,22 +258,40 @@ class FarmOSPlantTypesWidget(Widget):
         return super().serialize(field, cstruct, **kw)
 
 
-class PlantTypeRefsWidget(WuttaCheckboxChoiceWidget):
+class PlantTypeRefsWidget(Widget):
     """
     Widget for Plant Types field (on a Plant Asset).
     """
 
+    template = "planttyperefs"
+    values = ()
+
+    def __init__(self, request, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.request = request
+        self.config = self.request.wutta_config
+        self.app = self.config.get_app()
+
     def serialize(self, field, cstruct, **kw):
         """ """
         model = self.app.model
         session = Session()
 
-        readonly = kw.get("readonly", self.readonly)
-        if readonly:
-            plant_types = []
-            for uuid in json.loads(cstruct):
-                plant_type = session.get(model.PlantType, uuid)
-                plant_types.append(
+        if cstruct in (colander.null, None):
+            cstruct = ()
+
+        if readonly := kw.get("readonly", self.readonly):
+            items = []
+
+            plant_types = (
+                session.query(model.PlantType)
+                .filter(model.PlantType.uuid.in_(cstruct))
+                .order_by(model.PlantType.name)
+                .all()
+            )
+
+            for plant_type in plant_types:
+                items.append(
                     HTML.tag(
                         "li",
                         c=tags.link_to(
@@ -284,9 +302,33 @@ class PlantTypeRefsWidget(WuttaCheckboxChoiceWidget):
                         ),
                     )
                 )
-            return HTML.tag("ul", c=plant_types)
 
-        return super().serialize(field, cstruct, **kw)
+            return HTML.tag("ul", c=items)
+
+        values = kw.get("values", self.values)
+        if not isinstance(values, sequence_types):
+            raise TypeError("Values must be a sequence type (list, tuple, or range).")
+
+        kw["values"] = _normalize_choices(values)
+        tmpl_values = self.get_template_values(field, cstruct, kw)
+        return field.renderer(self.template, **tmpl_values)
+
+    def get_template_values(self, field, cstruct, kw):
+        """ """
+        values = super().get_template_values(field, cstruct, kw)
+
+        values["js_values"] = json.dumps(values["values"])
+
+        if self.request.has_perm("plant_types.create"):
+            values["can_create"] = True
+
+        return values
+
+    def deserialize(self, field, pstruct):
+        if not pstruct:
+            return colander.null
+
+        return set(pstruct.split(","))
 
 
 class StructureWidget(Widget):
diff --git a/src/wuttafarm/web/templates/deform/planttyperefs.pt b/src/wuttafarm/web/templates/deform/planttyperefs.pt
new file mode 100644
index 0000000..83cb095
--- /dev/null
+++ b/src/wuttafarm/web/templates/deform/planttyperefs.pt
@@ -0,0 +1,13 @@
+<div tal:define="
+     name name|field.name;
+     oid oid|field.oid;
+     vmodel vmodel|'modelData.'+oid;
+     can_create can_create|False;"
+     tal:omit-tag="">
+
+  <plant-types-picker tal:attributes="name name;
+                                      v-model vmodel;
+                                      :plant-types js_values;
+                                      :can-create str(can_create).lower();" />
+
+</div>
diff --git a/src/wuttafarm/web/templates/wuttafarm-components.mako b/src/wuttafarm/web/templates/wuttafarm-components.mako
index b973cb1..37b176e 100644
--- a/src/wuttafarm/web/templates/wuttafarm-components.mako
+++ b/src/wuttafarm/web/templates/wuttafarm-components.mako
@@ -1,6 +1,7 @@
 
 <%def name="make_wuttafarm_components()">
   ${self.make_animal_type_picker_component()}
+  ${self.make_plant_types_picker_component()}
 </%def>
 
 <%def name="make_animal_type_picker_component()">
@@ -126,3 +127,198 @@
     <% request.register_component('animal-type-picker', 'AnimalTypePicker') %>
   </script>
 </%def>
+
+<%def name="make_plant_types_picker_component()">
+  <script type="text/x-template" id="plant-types-picker-template">
+    <div>
+      <input type="hidden" :name="name" :value="value" />
+
+      <div style="display: flex; gap: 0.5rem; align-items: center;">
+
+        <span>Add:</span>
+
+        <b-autocomplete v-model="addName"
+                        ref="addName"
+                        :data="addNameData"
+                        field="name"
+                        open-on-focus
+                        keep-first
+                        @select="addNameSelected"
+                        clear-on-select
+                        style="flex-grow: 1;">
+          <template #empty>No results found</template>
+        </b-autocomplete>
+
+        <b-button type="is-primary"
+                  icon-pack="fas"
+                  icon-left="plus"
+                  @click="createInit()">
+          New
+        </b-button>
+
+      </div>
+
+      <${b}-table :data="plantTypeData">
+
+        <${b}-table-column field="name" v-slot="props">
+          <span>{{ props.row.name }}</span>
+        </${b}-table-column>
+
+        <${b}-table-column v-slot="props">
+            <a href="#"
+               class="has-text-danger"
+               @click.prevent="removePlantType(props.row)">
+              <i class="fas fa-trash" /> &nbsp; Remove
+            </a>
+        </${b}-table-column>
+
+      </${b}-table>
+
+      <${b}-modal v-if="canCreate"
+                  has-modal-card
+                  % if request.use_oruga:
+                  v-model:active="createShowDialog"
+                  % else:
+                  :active.sync="createShowDialog"
+                  % endif
+                  >
+        <div class="modal-card">
+
+          <header class="modal-card-head">
+            <p class="modal-card-title">New Plant Type</p>
+          </header>
+
+          <section class="modal-card-body">
+            <b-field label="Name" horizontal>
+              <b-input v-model="createName"
+                       ref="createName"
+                       expanded
+                       @keydown.native="createNameKeydown" />
+            </b-field>
+          </section>
+
+          <footer class="modal-card-foot">
+            <b-button type="is-primary"
+                      @click="createSave()"
+                      :disabled="createSaving || !createName"
+                      icon-pack="fas"
+                      icon-left="save">
+              {{ createSaving ? "Working, please wait..." : "Save" }}
+            </b-button>
+            <b-button @click="createShowDialog = false">
+              Cancel
+            </b-button>
+          </footer>
+        </div>
+      </${b}-modal>
+    </div>
+  </script>
+  <script>
+    const PlantTypesPicker = {
+        template: '#plant-types-picker-template',
+        mixins: [WuttaRequestMixin],
+        props: {
+            name: String,
+            value: Array,
+            plantTypes: Array,
+            canCreate: Boolean,
+        },
+        data() {
+            return {
+                internalPlantTypes: this.plantTypes.map((pt) => {
+                    return {uuid: pt[0], name: pt[1]}
+                }),
+
+                addShowDialog: false,
+                addName: '',
+
+                createShowDialog: false,
+                createName: null,
+                createSaving: false,
+            }
+        },
+        computed: {
+            plantTypeData() {
+                const data = []
+
+                if (this.value) {
+                    for (let ptype of this.internalPlantTypes) {
+                        // ptype = {uuid: ptype[0], name: ptype[1]}
+                        if (this.value.includes(ptype.uuid)) {
+                            data.push(ptype)
+                        }
+                    }
+                }
+
+                return data
+            },
+            addNameData() {
+                if (!this.addName) {
+                    return this.internalPlantTypes
+                }
+
+                return this.internalPlantTypes.filter((ptype) => {
+                    return ptype.name.toLowerCase().indexOf(this.addName.toLowerCase()) >= 0
+                })
+            },
+        },
+        methods: {
+
+            addNameSelected(option) {
+                const value = Array.from(this.value || [])
+
+                if (!value.includes(option.uuid)) {
+                    value.push(option.uuid)
+                    this.$emit('input', value)
+                }
+
+                this.addName = null
+            },
+
+            createInit() {
+                this.createName = this.addName
+                this.createShowDialog = true
+                this.$nextTick(() => {
+                    this.$refs.createName.focus()
+                })
+            },
+
+            createNameKeydown(event) {
+                // nb. must prevent main form submit on ENTER
+                // (since ultimately this lives within an outer form)
+                // but also we can submit the modal pseudo-form
+                if (event.which == 13) {
+                    event.preventDefault()
+                    this.createSave()
+                }
+            },
+
+            createSave() {
+                this.createSaving = true
+                const url = "${url('plant_types.ajax_create')}"
+                const params = {name: this.createName}
+                this.wuttaPOST(url, params, response => {
+                    this.internalPlantTypes.push(response.data)
+                    const value = Array.from(this.value || [])
+                    value.push(response.data.uuid)
+                    this.$emit('input', value)
+                    this.addName = null
+                    this.createSaving = false
+                    this.createShowDialog = false
+                }, response => {
+                    this.createSaving = false
+                })
+            },
+
+            removePlantType(ptype) {
+                let value = Array.from(this.value)
+                const i = value.indexOf(ptype.uuid)
+                value.splice(i, 1)
+                this.$emit('input', value)
+            },
+        },
+    }
+    Vue.component('plant-types-picker', PlantTypesPicker)
+    <% request.register_component('plant-types-picker', 'PlantTypesPicker') %>
+  </script>
+</%def>
diff --git a/src/wuttafarm/web/views/plants.py b/src/wuttafarm/web/views/plants.py
index cd6cb34..a2d0cb1 100644
--- a/src/wuttafarm/web/views/plants.py
+++ b/src/wuttafarm/web/views/plants.py
@@ -26,6 +26,7 @@ Master view for Plants
 from webhelpers2.html import tags
 
 from wuttaweb.forms.schema import WuttaDictEnum
+from wuttaweb.util import get_form_data
 
 from wuttafarm.db.model import PlantType, PlantAsset
 from wuttafarm.web.views.assets import AssetTypeMasterView, AssetMasterView
@@ -42,8 +43,9 @@ class PlantTypeView(AssetTypeMasterView):
     route_prefix = "plant_types"
     url_prefix = "/plant-types"
 
+    farmos_entity_type = "taxonomy_term"
+    farmos_bundle = "plant_type"
     farmos_refurl_path = "/admin/structure/taxonomy/manage/plant_type/overview"
-    farmos_bundle = "plant"
 
     grid_columns = [
         "name",
@@ -101,6 +103,19 @@ class PlantTypeView(AssetTypeMasterView):
 
         return buttons
 
+    def delete(self):
+        plant_type = self.get_instance()
+
+        if plant_type._plant_assets:
+            self.request.session.flash(
+                "Cannot delete plant type which is still referenced by plant assets.",
+                "warning",
+            )
+            url = self.get_action_url("view", plant_type)
+            return self.redirect(self.request.get_referrer(default=url))
+
+        return super().delete()
+
     def get_row_grid_data(self, plant_type):
         model = self.app.model
         session = self.Session()
@@ -129,6 +144,55 @@ class PlantTypeView(AssetTypeMasterView):
     def get_row_action_url_view(self, plant, i):
         return self.request.route_url("plant_assets.view", uuid=plant.uuid)
 
+    def ajax_create(self):
+        """
+        AJAX view to create a new plant type.
+        """
+        model = self.app.model
+        session = self.Session()
+        data = get_form_data(self.request)
+
+        name = data.get("name")
+        if not name:
+            return {"error": "Name is required"}
+
+        plant_type = model.PlantType(name=name)
+        session.add(plant_type)
+        session.flush()
+
+        if self.app.is_farmos_mirror():
+            token = self.request.session.get("farmos.oauth2.token")
+            self.app.auto_sync_to_farmos(plant_type, token=token)
+
+        return {
+            "uuid": plant_type.uuid.hex,
+            "name": plant_type.name,
+            "farmos_uuid": plant_type.farmos_uuid.hex,
+            "drupal_id": plant_type.drupal_id,
+        }
+
+    @classmethod
+    def defaults(cls, config):
+        """ """
+        cls._defaults(config)
+        cls._plant_type_defaults(config)
+
+    @classmethod
+    def _plant_type_defaults(cls, config):
+        route_prefix = cls.get_route_prefix()
+        permission_prefix = cls.get_permission_prefix()
+        url_prefix = cls.get_url_prefix()
+
+        # ajax_create
+        config.add_route(f"{route_prefix}.ajax_create", f"{url_prefix}/ajax/new")
+        config.add_view(
+            cls,
+            attr="ajax_create",
+            route_name=f"{route_prefix}.ajax_create",
+            permission=f"{permission_prefix}.create",
+            renderer="json",
+        )
+
 
 class PlantAssetView(AssetMasterView):
     """
@@ -139,6 +203,7 @@ class PlantAssetView(AssetMasterView):
     route_prefix = "plant_assets"
     url_prefix = "/assets/plant"
 
+    farmos_bundle = "plant"
     farmos_refurl_path = "/assets/plant"
 
     labels = {
@@ -196,18 +261,38 @@ class PlantAssetView(AssetMasterView):
         plant = f.model_instance
 
         # plant_types
-        if self.creating or self.editing:
-            f.remove("plant_types")  # TODO: add support for this
-        else:
-            f.set_node("plant_types", PlantTypeRefs(self.request))
-            f.set_default(
-                "plant_types", [t.plant_type_uuid for t in plant._plant_types]
-            )
+        f.set_node("plant_types", PlantTypeRefs(self.request))
+        if not self.creating:
+            # nb. must explcitly declare value for non-standard field
+            f.set_default("plant_types", [pt.uuid for pt in plant.plant_types])
 
         # season
         if self.creating or self.editing:
             f.remove("season")  # TODO: add support for this
 
+    def objectify(self, form):
+        model = self.app.model
+        session = self.Session()
+        plant = super().objectify(form)
+        data = form.validated
+
+        current = [pt.uuid for pt in plant.plant_types]
+        desired = data["plant_types"]
+
+        for uuid in desired:
+            if uuid not in current:
+                plant_type = session.get(model.PlantType, uuid)
+                assert plant_type
+                plant.plant_types.append(plant_type)
+
+        for uuid in current:
+            if uuid not in desired:
+                plant_type = session.get(model.PlantType, uuid)
+                assert plant_type
+                plant.plant_types.remove(plant_type)
+
+        return plant
+
 
 def defaults(config, **kwargs):
     base = globals()