diff --git a/chrome/content/zotero/xpcom/collectionTreeView.js b/chrome/content/zotero/xpcom/collectionTreeView.js
index c3de245fa..db1e90033 100644
--- a/chrome/content/zotero/xpcom/collectionTreeView.js
+++ b/chrome/content/zotero/xpcom/collectionTreeView.js
@@ -338,8 +338,7 @@ Zotero.CollectionTreeView.prototype.notify = Zotero.Promise.coroutine(function*
 		// If trash is refreshed, we probably need to update the icon from full to empty
 		if (type == 'trash') {
 			// libraryID is passed as parameter to 'refresh'
-			let deleted = yield Zotero.Items.getDeleted(ids[0], true);
-			this._trashNotEmpty[ids[0]] = !!deleted.length;
+			this._trashNotEmpty[ids[0]] = yield Zotero.Items.hasDeleted(ids[0]);
 			let row = this.getRowIndexByID("T" + ids[0]);
 			this._treebox.invalidateRow(row);
 		}
diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index cc9e1d802..8ab56825e 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -3603,6 +3603,28 @@ Zotero.Item.prototype.inCollection = function (collectionID) {
 };
 
 
+/**
+ * Update item deleted (i.e., trash) state without marking as changed or modifying DB
+ *
+ * This is used by Zotero.Items.trash().
+ *
+ * Database state must be set separately!
+ *
+ * @param {Boolean} deleted
+ */
+Zotero.DataObject.prototype.setDeleted = Zotero.Promise.coroutine(function* (deleted) {
+	if (!this.id) {
+		throw new Error("Cannot update deleted state of unsaved item");
+	}
+	
+	this._deleted = !!deleted;
+	
+	if (this._changed.deleted) {
+		delete this._changed.deleted;
+	}
+});
+
+
 Zotero.Item.prototype.getImageSrc = function() {
 	var itemType = Zotero.ItemTypes.getName(this.itemTypeID);
 	if (itemType == 'attachment') {
diff --git a/chrome/content/zotero/xpcom/data/items.js b/chrome/content/zotero/xpcom/data/items.js
index 0391fa760..3e57e79ae 100644
--- a/chrome/content/zotero/xpcom/data/items.js
+++ b/chrome/content/zotero/xpcom/data/items.js
@@ -103,12 +103,23 @@ Zotero.Items = function() {
 	
 	this._relationsTable = "itemRelations";
 	
+	
+	/**
+	 * @param {Integer} libraryID
+	 * @return {Promise<Boolean>} - True if library has items in trash, false otherwise
+	 */
+	this.hasDeleted = Zotero.Promise.coroutine(function* (libraryID) {
+		var sql = "SELECT COUNT(*) > 0 FROM items JOIN deletedItems USING (itemID) WHERE libraryID=?";
+		return !!(yield Zotero.DB.valueQueryAsync(sql, [libraryID]));
+	});
+	
+	
 	/**
 	 * Return items marked as deleted
 	 *
 	 * @param {Integer} libraryID - Library to search
 	 * @param {Boolean} [asIDs] - Return itemIDs instead of Zotero.Item objects
-	 * @return {Zotero.Item[]|Integer[]}
+	 * @return {Promise<Zotero.Item[]|Integer[]>}
 	 */
 	this.getDeleted = Zotero.Promise.coroutine(function* (libraryID, asIDs, days) {
 		var sql = "SELECT itemID FROM items JOIN deletedItems USING (itemID) "
@@ -818,14 +829,14 @@ Zotero.Items = function() {
 	this.trash = Zotero.Promise.coroutine(function* (ids) {
 		Zotero.DB.requireTransaction();
 		
+		var libraryIDs = new Set();
 		ids = Zotero.flattenArguments(ids);
-		
-		for (let i=0; i<ids.length; i++) {
-			let id = ids[i];
-			let item = yield this.getAsync(id);
+		var items = [];
+		for (let id of ids) {
+			let item = this.get(id);
 			if (!item) {
 				Zotero.debug('Item ' + id + ' does not exist in Items.trash()!', 1);
-				Zotero.Notifier.queue('delete', 'item', id);
+				Zotero.Notifier.queue('trash', 'item', id);
 				continue;
 			}
 			
@@ -833,15 +844,32 @@ Zotero.Items = function() {
 				throw new Error(item._ObjectType + " " + item.libraryKey + " is not editable");
 			}
 			
-			if (!Zotero.Libraries.hasTrash(item.libraryID)) {
-				throw new Error(Zotero.Libraries.getName(item.libraryID) + " does not have Trash");
+			if (!Zotero.Libraries.get(item.libraryID).hasTrash) {
+				throw new Error(Zotero.Libraries.getName(item.libraryID) + " does not have a trash");
 			}
 			
-			item.deleted = true;
-			yield item.save({
-				skipDateModifiedUpdate: true
-			});
+			items.push(item);
+			libraryIDs.add(item.libraryID);
 		}
+		
+		items.forEach(item => {
+			item.setDeleted(true);
+		});
+		yield Zotero.Utilities.Internal.forEachChunkAsync(ids, 250, Zotero.Promise.coroutine(function* (chunk) {
+			yield Zotero.DB.queryAsync(
+				"UPDATE items SET synced=1, clientDateModified=CURRENT_TIMESTAMP "
+					+ `WHERE itemID IN (${chunk.map(id => parseInt(id)).join(", ")})`
+			);
+			yield Zotero.DB.queryAsync(
+				"INSERT OR IGNORE INTO deletedItems (itemID) VALUES "
+					+ chunk.map(id => "(" + id + ")").join(", ")
+			);
+		}.bind(this)));
+		
+		Zotero.Notifier.queue('trash', 'item', ids);
+		Array.from(libraryIDs).forEach(libraryID => {
+			Zotero.Notifier.queue('refresh', 'trash', libraryID);
+		});
 	});
 	
 	
diff --git a/chrome/content/zotero/xpcom/itemTreeView.js b/chrome/content/zotero/xpcom/itemTreeView.js
index 3126da6df..316ea5888 100644
--- a/chrome/content/zotero/xpcom/itemTreeView.js
+++ b/chrome/content/zotero/xpcom/itemTreeView.js
@@ -641,7 +641,6 @@ Zotero.ItemTreeView.prototype.notify = Zotero.Promise.coroutine(function* (actio
 			}
 			
 			madeChanges = true;
-			sort = true;
 		}
 	}
 	else if (type == 'item' && action == 'modify')
diff --git a/test/tests/itemsTest.js b/test/tests/itemsTest.js
index a7a44d1b9..d558fdfa9 100644
--- a/test/tests/itemsTest.js
+++ b/test/tests/itemsTest.js
@@ -87,6 +87,28 @@ describe("Zotero.Items", function () {
 		})
 	})
 	
+	
+	describe("#trash()", function () {
+		it("should send items to the trash", function* () {
+			var items = [];
+			items.push(
+				(yield createDataObject('item')),
+				(yield createDataObject('item')),
+				(yield createDataObject('item'))
+			);
+			var ids = items.map(item => item.id);
+			yield Zotero.Items.trashTx(ids);
+			items.forEach(item => {
+				assert.isTrue(item.deleted);
+				assert.isFalse(item.hasChanged());
+			});
+			assert.equal((yield Zotero.DB.valueQueryAsync(
+				`SELECT COUNT(*) FROM deletedItems WHERE itemID IN (${ids})`
+			)), 3);
+		});
+	});
+	
+	
 	describe("#emptyTrash()", function () {
 		it("should delete items in the trash", function* () {
 			var item1 = createUnsavedDataObject('item');