diff --git a/app/javascript/components/EditGardenModal.jsx b/app/javascript/components/EditGardenModal.jsx
new file mode 100644
index 000000000..0d719bef5
--- /dev/null
+++ b/app/javascript/components/EditGardenModal.jsx
@@ -0,0 +1,156 @@
+import React, {useEffect, useState} from 'react';
+
+import {getJson, patchJson} from '../api';
+import Modal from './Modal';
+
+function humanize(field) {
+  return field.replace(/_/g, ' ').replace(/^./, (c) => c.toUpperCase());
+}
+
+function errorMessages(status, data) {
+  if (status === 422 && data && data.errors) {
+    const messages = Object.entries(data.errors).flatMap(([field, list]) => list.map((m) => `${humanize(field)} ${m}`));
+    if (messages.length > 0) return messages;
+  }
+  if (status === 401) return ['Please sign in again to save this garden.'];
+  if (status === 403) return ['You can\'t change this garden.'];
+  return ['Something went wrong saving that. Please try again.'];
+}
+
+// The same fields as the garden edit page, in a dialog over the garden list. It
+// loads the garden's current values from /gardens/:slug/edit.json, saves with
+// PATCH, and hands the refreshed garden card to onSaved, so the list updates in
+// place and the page is never left.
+export default function EditGardenModal({garden, onClose, onSaved}) {
+  const [form, setForm] = useState(null); // {garden, area_units, garden_types, location_help, ...}
+  const [values, setValues] = useState(null);
+  const [loadError, setLoadError] = useState(false);
+  const [saving, setSaving] = useState(false);
+  const [errors, setErrors] = useState([]);
+
+  useEffect(() => {
+    const controller = new AbortController();
+    (async () => {
+      try {
+        const {ok, data} = await getJson(`${garden.url}/edit.json`, {signal: controller.signal});
+        if (!ok) throw new Error('load failed');
+        setForm(data);
+        setValues(data.garden);
+      } catch (error) {
+        if (error.name !== 'AbortError') setLoadError(true);
+      }
+    })();
+    return () => controller.abort();
+  }, [garden.url]);
+
+  const set = (field) => (event) => {
+    const {type, checked, value} = event.target;
+    setValues((current) => ({...current, [field]: type === 'checkbox' ? checked : value}));
+  };
+
+  async function save(event) {
+    event.preventDefault();
+    setSaving(true);
+    setErrors([]);
+    const {name, description, location, area, area_unit: areaUnit, garden_type_id: gardenTypeId, active} = values;
+    try {
+      const {ok, status, data} = await patchJson(garden.url, {
+        garden: {name, description, location, area, area_unit: areaUnit, garden_type_id: gardenTypeId, active},
+      });
+      if (ok) {
+        onSaved(data.garden); // closes this dialog
+        return;
+      }
+      setErrors(errorMessages(status, data));
+    } catch (error) {
+      setErrors(['Couldn\'t reach the server. Please try again.']);
+    }
+    setSaving(false);
+  }
+
+  return (
+    <Modal title={`Edit ${garden.name}`} titleId={`edit-garden-title-${garden.id}`} onClose={onClose}>
+      {loadError && (
+        <div className="modal-body">
+          <div className="alert alert-danger mb-0" role="alert">Couldn&rsquo;t load this garden. Please close this and try again.</div>
+        </div>
+      )}
+      {!loadError && !values && (
+        <div className="modal-body" role="status"><i className="fa fa-spinner fa-spin" aria-hidden="true" /> Loading…</div>
+      )}
+      {values && (
+        <form onSubmit={save}>
+          <div className="modal-body edit-garden-body">
+            {errors.length > 0 && (
+              <div className="alert alert-danger" role="alert">
+                <strong>That didn&rsquo;t save.</strong>
+                <ul className="mb-0">{errors.map((message) => <li key={message}>{message}</li>)}</ul>
+              </div>
+            )}
+
+            <div className="mb-3">
+              <label className="form-label" htmlFor="edit-garden-name">Name</label>
+              <input id="edit-garden-name" type="text" className="form-control" maxLength="255" required value={values.name || ''} onChange={set('name')} />
+            </div>
+
+            <div className="mb-3">
+              <label className="form-label" htmlFor="edit-garden-description">Description</label>
+              <textarea
+                id="edit-garden-description"
+                className="form-control"
+                rows="4"
+                placeholder="Where is it? What does it look like? Do you have irrigation? What are your plans?"
+                value={values.description || ''}
+                onChange={set('description')}
+              />
+            </div>
+
+            <div className="mb-3">
+              <label className="form-label" htmlFor="edit-garden-location">Location</label>
+              <input id="edit-garden-location" type="text" className="form-control" maxLength="255" aria-describedby="edit-garden-location-help" value={values.location || ''} onChange={set('location')} />
+              <div id="edit-garden-location-help" className="form-text">
+                {form.location_help}{' '}
+                <a href={form.settings_url} target="_blank" rel="noopener noreferrer">{form.member_has_location ? 'Change your location.' : 'Set your location now.'}</a>
+              </div>
+            </div>
+
+            <div className="row g-3 mb-3">
+              <div className="col-md-5">
+                <label className="form-label" htmlFor="edit-garden-area">Area</label>
+                <input id="edit-garden-area" type="number" step="any" min="0" className="form-control" value={values.area ?? ''} onChange={set('area')} />
+              </div>
+              <div className="col-md-7">
+                <label className="form-label" htmlFor="edit-garden-area-unit">Area unit</label>
+                <select id="edit-garden-area-unit" className="form-select" value={values.area_unit || ''} onChange={set('area_unit')}>
+                  {form.area_units.map((unit) => <option key={unit.value} value={unit.value}>{unit.label}</option>)}
+                </select>
+              </div>
+            </div>
+
+            <div className="mb-3">
+              <label className="form-label" htmlFor="edit-garden-type">Garden type</label>
+              <select id="edit-garden-type" className="form-select" value={values.garden_type_id ?? ''} onChange={set('garden_type_id')}>
+                <option value="" />
+                {form.garden_types.map((type) => <option key={type.id} value={type.id}>{type.name}</option>)}
+              </select>
+            </div>
+
+            <div className="form-check">
+              <input id="edit-garden-active" type="checkbox" className="form-check-input" checked={!!values.active} onChange={set('active')} />
+              <label className="form-check-label" htmlFor="edit-garden-active">Active?</label>
+              <div className="form-text">
+                You can mark a garden as inactive if you no longer use it.
+                Note: this will mark all plantings in the garden as &ldquo;finished&rdquo;.
+              </div>
+            </div>
+          </div>
+          <div className="modal-footer">
+            <button type="submit" className="btn btn-success btn-plant" disabled={saving} aria-busy={saving}>
+              {saving ? <><i className="fa fa-spinner fa-spin" aria-hidden="true" /> Saving…</> : 'Save garden'}
+            </button>
+          </div>
+        </form>
+      )}
+    </Modal>
+  );
+}
diff --git a/app/javascript/components/GardenCard.jsx b/app/javascript/components/GardenCard.jsx
index 346cb800c..6c92523ec 100644
--- a/app/javascript/components/GardenCard.jsx
+++ b/app/javascript/components/GardenCard.jsx
@@ -8,7 +8,7 @@ import PlantingRow from './PlantingRow';
 // One garden: its name and actions menu (top right), a picture, then what is
 // planted, as perennials (just names) and annuals (each with its progress).
 // Matches gardens/_card.
-export default function GardenCard({garden, defaultIconUrl, onPlant, highlightedId, highlightKind, onPlantingUpdated, onEditPlanting, onHarvestPlanting, onSaveSeedsPlanting, onAddPhoto, onFinishPlanting}) {
+export default function GardenCard({garden, defaultIconUrl, onPlant, highlightedId, highlightKind, onPlantingUpdated, onEditPlanting, onHarvestPlanting, onSaveSeedsPlanting, onAddPhoto, onFinishPlanting, onEditGarden}) {
   const {id, name, url, image_url: imageUrl, owner, actions, plant_url: plantUrl, perennials, annuals} = garden;
   const empty = perennials.length === 0 && annuals.length === 0;
   // What each planting's menu items open, for annuals and perennials alike.
@@ -47,9 +47,13 @@ export default function GardenCard({garden, defaultIconUrl, onPlant, highlighted
             ariaLabel={`Actions for ${name}`}
             className="btn btn-sm btn-link actions-toggle-dots"
             onSelect={(action, event) => {
-              if (action.key === 'photo' && onAddPhoto && isPlainClick(event)) {
+              if (!isPlainClick(event)) return;
+              if (action.key === 'photo' && onAddPhoto) {
                 event.preventDefault();
                 onAddPhoto({label: name, href: action.href});
+              } else if (action.key === 'edit' && onEditGarden) {
+                event.preventDefault();
+                onEditGarden(garden);
               }
             }}
           />
diff --git a/app/javascript/components/GardenCards.jsx b/app/javascript/components/GardenCards.jsx
index a5ceebc32..549ab93ef 100644
--- a/app/javascript/components/GardenCards.jsx
+++ b/app/javascript/components/GardenCards.jsx
@@ -1,6 +1,7 @@
 import React, {useEffect, useRef, useState} from 'react';
 
 import AddPhotoModal from './AddPhotoModal';
+import EditGardenModal from './EditGardenModal';
 import EditPlantingModal from './EditPlantingModal';
 import GardenCard from './GardenCard';
 import MarkFinishedModal from './MarkFinishedModal';
@@ -22,6 +23,7 @@ export default function GardenCards({gardens: initialGardens, default_icon_url:
   const [savingSeeds, setSavingSeeds] = useState(null); // the planting the save seeds dialog is open for
   const [addingPhoto, setAddingPhoto] = useState(null); // {label, href}: what the add photo dialog is open for
   const [finishing, setFinishing] = useState(null); // the planting the mark as finished dialog is open for
+  const [editingGarden, setEditingGarden] = useState(null); // the garden the edit dialog is open for
   const [notice, setNotice] = useState(null);
   const [highlight, setHighlight] = useState(null); // {id, kind}: the planting just added or harvested
   const highlightTimer = useRef(null);
@@ -89,6 +91,19 @@ export default function GardenCards({gardens: initialGardens, default_icon_url:
     setNotice(`Marked ${planting.crop.name} as finished.`);
   }
 
+  // Saved from the garden's edit dialog. A garden marked inactive is not on this
+  // list, so it leaves it, and its plantings with it.
+  function gardenEdited(updatedCard) {
+    setEditingGarden(null);
+    if (updatedCard.active) {
+      replaceCard(updatedCard);
+      setNotice(`Saved changes to ${updatedCard.name}.`);
+    } else {
+      setGardens((current) => current.filter((garden) => garden.id !== updatedCard.id));
+      setNotice(`${updatedCard.name} is now inactive, and its plantings are finished. You will find it under inactive gardens.`);
+    }
+  }
+
   return (
     <>
       {notice && (
@@ -111,6 +126,7 @@ export default function GardenCards({gardens: initialGardens, default_icon_url:
           onSaveSeedsPlanting={setSavingSeeds}
           onAddPhoto={setAddingPhoto}
           onFinishPlanting={setFinishing}
+          onEditGarden={setEditingGarden}
         />
       ))}
       {editing && (
@@ -136,6 +152,13 @@ export default function GardenCards({gardens: initialGardens, default_icon_url:
           onSaved={(seed) => seedsSaved(seed, savingSeeds)}
         />
       )}
+      {editingGarden && (
+        <EditGardenModal
+          garden={editingGarden}
+          onClose={() => setEditingGarden(null)}
+          onSaved={gardenEdited}
+        />
+      )}
       {finishing && (
         <MarkFinishedModal
           planting={finishing}