diff --git a/etc/Makefile.am b/etc/Makefile.am
index 53064eb6f6ea..b4b3ae1f5798 100644
--- a/etc/Makefile.am
+++ b/etc/Makefile.am
@@ -1,95 +1,98 @@
 sudoersddir = $(sysconfdir)/sudoers.d
 sudoersd_DATA = \
 	%D%/sudoers.d/zfs
 
 dist_noinst_DATA += $(sudoersd_DATA)
 
 
 sysconf_zfsdir = $(sysconfdir)/zfs
 
 dist_sysconf_zfs_DATA = \
 	%D%/zfs/vdev_id.conf.alias.example \
 	%D%/zfs/vdev_id.conf.multipath.example \
 	%D%/zfs/vdev_id.conf.sas_direct.example \
 	%D%/zfs/vdev_id.conf.sas_switch.example \
 	%D%/zfs/vdev_id.conf.scsi.example
 
 sysconf_zfs_DATA = \
 	%D%/zfs/zfs-functions
 
 SUBSTFILES          += $(sysconf_zfs_DATA)
 SHELLCHECKSCRIPTS   += $(sysconf_zfs_DATA)
 $(call SHELLCHECK_OPTS,$(sysconf_zfs_DATA)): SHELLCHECK_SHELL = sh
 
 
 if BUILD_LINUX
 initconf_DATA = \
 	%D%/default/zfs
 
 SUBSTFILES          += $(initconf_DATA)
 SHELLCHECKSCRIPTS   += $(initconf_DATA)
 $(call SHELLCHECK_OPTS,$(initconf_DATA)): SHELLCHECK_SHELL = sh
 
 
 if INIT_SYSV
 dist_noinst_DATA += %D%/init.d/README.md
 
 init_SCRIPTS = \
 	%D%/init.d/zfs-import \
 	%D%/init.d/zfs-load-key \
 	%D%/init.d/zfs-mount \
 	%D%/init.d/zfs-share \
 	%D%/init.d/zfs-zed
 
 SUBSTFILES        += $(init_SCRIPTS)
 SHELLCHECKSCRIPTS += $(init_SCRIPTS)
 $(call SHELLCHECK_OPTS,$(init_SCRIPTS)): SHELLCHECK_SHELL = sh
 endif
 
 
 if INIT_SYSTEMD
 dist_systemdpreset_DATA = \
 	%D%/systemd/system/50-zfs.preset
 
 systemdunit_DATA = \
 	%D%/systemd/system/zfs-import-cache.service \
 	%D%/systemd/system/zfs-import-scan.service \
 	%D%/systemd/system/zfs-import.target \
 	%D%/systemd/system/zfs-mount.service \
 	%D%/systemd/system/zfs-scrub-monthly@.timer \
 	%D%/systemd/system/zfs-scrub-weekly@.timer \
 	%D%/systemd/system/zfs-scrub@.service \
+	%D%/systemd/system/zfs-trim-monthly@.timer \
+	%D%/systemd/system/zfs-trim-weekly@.timer \
+	%D%/systemd/system/zfs-trim@.service \
 	%D%/systemd/system/zfs-share.service \
 	%D%/systemd/system/zfs-volume-wait.service \
 	%D%/systemd/system/zfs-volumes.target \
 	%D%/systemd/system/zfs-zed.service \
 	%D%/systemd/system/zfs.target
 
 SUBSTFILES += $(systemdunit_DATA)
 
 INSTALL_DATA_HOOKS += systemd-install-data-hook
 systemd-install-data-hook:
 	$(MKDIR_P) "$(DESTDIR)$(systemdunitdir)"
 	ln -sf /dev/null "$(DESTDIR)$(systemdunitdir)/zfs-import.service"
 
 
 systemdgenerator_PROGRAMS = \
 	%D%/systemd/system-generators/zfs-mount-generator
 
 %C%_systemd_system_generators_zfs_mount_generator_SOURCES = \
 	%D%/systemd/system-generators/zfs-mount-generator.c
 
 %C%_systemd_system_generators_zfs_mount_generator_LDADD = \
 	libzfs.la
 
 %C%_systemd_system_generators_zfs_mount_generator_LDFLAGS = -pthread
 
 CPPCHECKTARGETS += $(systemdgenerator_PROGRAMS)
 endif
 
 
 if WANT_MODULES_LOAD_D
 dist_modulesload_DATA = \
 	%D%/modules-load.d/zfs.conf
 endif
 endif
diff --git a/etc/systemd/system/zfs-trim-monthly@.timer.in b/etc/systemd/system/zfs-trim-monthly@.timer.in
new file mode 100644
index 000000000000..8c13ffb304b3
--- /dev/null
+++ b/etc/systemd/system/zfs-trim-monthly@.timer.in
@@ -0,0 +1,12 @@
+[Unit]
+Description=Monthly zpool trim timer for %i
+Documentation=man:zpool-trim(8)
+
+[Timer]
+OnCalendar=monthly
+Persistent=true
+RandomizedDelaySec=1h
+Unit=zfs-trim@%i.service
+
+[Install]
+WantedBy=timers.target
diff --git a/etc/systemd/system/zfs-trim-weekly@.timer.in b/etc/systemd/system/zfs-trim-weekly@.timer.in
new file mode 100644
index 000000000000..dced3d88b5c9
--- /dev/null
+++ b/etc/systemd/system/zfs-trim-weekly@.timer.in
@@ -0,0 +1,12 @@
+[Unit]
+Description=Weekly zpool trim timer for %i
+Documentation=man:zpool-trim(8)
+
+[Timer]
+OnCalendar=weekly
+Persistent=true
+RandomizedDelaySec=1h
+Unit=zfs-trim@%i.service
+
+[Install]
+WantedBy=timers.target
diff --git a/etc/systemd/system/zfs-trim@.service.in b/etc/systemd/system/zfs-trim@.service.in
new file mode 100644
index 000000000000..423fb448c16f
--- /dev/null
+++ b/etc/systemd/system/zfs-trim@.service.in
@@ -0,0 +1,15 @@
+[Unit]
+Description=zpool trim on %i
+Documentation=man:zpool-trim(8)
+Requires=zfs.target
+After=zfs.target
+ConditionACPower=true
+ConditionPathIsDirectory=/sys/module/zfs
+
+[Service]
+EnvironmentFile=-@initconfdir@/zfs
+ExecStart=/bin/sh -c '\
+if @sbindir@/zpool status %i | grep -q "(trimming)"; then\
+exec @sbindir@/zpool wait -t trim %i;\
+else exec @sbindir@/zpool trim -w %i; fi'
+ExecStop=-/bin/sh -c '@sbindir@/zpool trim -s %i 2>/dev/null || true'
diff --git a/man/man8/zpool-trim.8 b/man/man8/zpool-trim.8
index d9a7b4400301..ad0909a3b08d 100644
--- a/man/man8/zpool-trim.8
+++ b/man/man8/zpool-trim.8
@@ -1,91 +1,112 @@
 .\"
 .\" CDDL HEADER START
 .\"
 .\" The contents of this file are subject to the terms of the
 .\" Common Development and Distribution License (the "License").
 .\" You may not use this file except in compliance with the License.
 .\"
 .\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 .\" or http://www.opensolaris.org/os/licensing.
 .\" See the License for the specific language governing permissions
 .\" and limitations under the License.
 .\"
 .\" When distributing Covered Code, include this CDDL HEADER in each
 .\" file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 .\" If applicable, add the following below this CDDL HEADER, with the
 .\" fields enclosed by brackets "[]" replaced with your own identifying
 .\" information: Portions Copyright [yyyy] [name of copyright owner]
 .\"
 .\" CDDL HEADER END
 .\"
 .\" Copyright (c) 2007, Sun Microsystems, Inc. All Rights Reserved.
 .\" Copyright (c) 2012, 2018 by Delphix. All rights reserved.
 .\" Copyright (c) 2012 Cyril Plisko. All Rights Reserved.
 .\" Copyright (c) 2017 Datto Inc.
 .\" Copyright (c) 2018 George Melikov. All Rights Reserved.
 .\" Copyright 2017 Nexenta Systems, Inc.
 .\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
 .\"
 .Dd May 27, 2021
 .Dt ZPOOL-TRIM 8
 .Os
 .
 .Sh NAME
 .Nm zpool-trim
 .Nd initiate TRIM of free space in ZFS storage pool
 .Sh SYNOPSIS
 .Nm zpool
 .Cm trim
 .Op Fl dw
 .Op Fl r Ar rate
 .Op Fl c Ns | Ns Fl s
 .Ar pool
 .Oo Ar device Ns Oc Ns …
 .
 .Sh DESCRIPTION
 Initiates an immediate on-demand TRIM operation for all of the free space in
 a pool.
 This operation informs the underlying storage devices of all blocks
 in the pool which are no longer allocated and allows thinly provisioned
 devices to reclaim the space.
 .Pp
 A manual on-demand TRIM operation can be initiated irrespective of the
 .Sy autotrim
 pool property setting.
 See the documentation for the
 .Sy autotrim
 property above for the types of vdev devices which can be trimmed.
 .Bl -tag -width Ds
 .It Fl d , -secure
 Causes a secure TRIM to be initiated.
 When performing a secure TRIM, the
 device guarantees that data stored on the trimmed blocks has been erased.
 This requires support from the device and is not supported by all SSDs.
 .It Fl r , -rate Ar rate
 Controls the rate at which the TRIM operation progresses.
 Without this
 option TRIM is executed as quickly as possible.
 The rate, expressed in bytes
 per second, is applied on a per-vdev basis and may be set differently for
 each leaf vdev.
 .It Fl c , -cancel
 Cancel trimming on the specified devices, or all eligible devices if none
 are specified.
 If one or more target devices are invalid or are not currently being
 trimmed, the command will fail and no cancellation will occur on any device.
 .It Fl s , -suspend
 Suspend trimming on the specified devices, or all eligible devices if none
 are specified.
 If one or more target devices are invalid or are not currently being
 trimmed, the command will fail and no suspension will occur on any device.
 Trimming can then be resumed by running
 .Nm zpool Cm trim
 with no flags on the relevant target devices.
 .It Fl w , -wait
 Wait until the devices are done being trimmed before returning.
 .El
+.Sh PERIODIC TRIM
+On machines using systemd, trim timers can be enabled on a per-pool basis.
+.Nm weekly
+and
+.Nm monthly
+timer units are provided.
+.Bl -tag -width Ds
+.It Xo
+.Xc
+.Nm systemctl
+.Cm enable
+.Cm zfs-trim-\fIweekly\fB@\fIrpool\fB.timer
+.Cm --now
+.It Xo
+.Xc
+.Nm systemctl
+.Cm enable
+.Cm zfs-trim-\fImonthly\fB@\fIotherpool\fB.timer
+.Cm --now
+.El
 .
 .Sh SEE ALSO
+.Xr systemd.timer 5 ,
 .Xr zpoolprops 7 ,
 .Xr zpool-initialize 8 ,
 .Xr zpool-wait 8