A short, curated guide — not an automatic related dump. Figures come from SubMouse's safe-for-work directory when we have them.
r/gardening (about 9.0M members, directory rank #85) is a broad plant-and-care community. Indoor-only care, plant identification, homestead systems, vegetable plots, sick-plant triage and landscaping each have clearer rooms.
SubMouse's algorithmic related list for gardening also surfaces unrelated names (for example nursing or Sephora) from weak text overlap. Those are not alternatives. This guide keeps seven plant-purpose communities: four corroborated by directory related plus ranking (houseplants, IndoorGarden, whatsthisplant, homestead) and three verified SFW specialty rooms (VegetableGardening, plantclinic, landscaping).
Stay on gardening for outdoor plots and general plant talk. Use houseplants or IndoorGarden for indoors, whatsthisplant for IDs, homestead for self-sufficiency systems, VegetableGardening for food crops, plantclinic for diagnosis, and landscaping for yards and hardscape.
r/gardening — Gardening, Plants, and Agriculture.
A place for the best guides, pictures, and discussions of all things related to plants and their care.
Houseplants
When to choose it: The plant lives indoors and care/well-being is the point.
Why it is here: Directory related and ranked for gardening; shared Houseplants topic. About 3.0M members, rank #357. See also gardening vs houseplants on SubMouse.
How it differs from r/gardening: Indoor focus versus gardening's outdoor/general breadth.
/r/IndoorGarden
When to choose it: You are growing an indoor garden including herbs or vegetables indoors.
Why it is here: Directory related and top ranked gardening match on garden terms. Description covers indoor gardens, herbs, vegetables and houseplants (about 1.2M members, rank #921).
How it differs from r/gardening: Indoor growing systems, not only decorative houseplant care.
What's This Plant
When to choose it: You need a plant identified from a photo.
Why it is here: Directory related with topic corroboration. Description invites plant photo IDs (about 1.8M members, rank #600).
How it differs from r/gardening: Identification format first; gardening is broader discussion.
homesteading, farming, gardening, self sufficiency and country life
When to choose it: Gardening sits inside livestock, food preservation and country self-sufficiency.
Why it is here: Directory related and ranked. Description covers ponds, barns, livestock, gardens and related homestead work (about 3.6M members, rank #282).
How it differs from r/gardening: Whole-homestead systems, not plant care alone.
Vegetable Gardening
When to choose it: Food crops and vegetable plots are the whole question.
Why it is here: Verified SFW community (about 632k members) titled Vegetable Gardening. Chosen as a crop-focused room rather than trusting noisy non-plant names on the raw related list.
How it differs from r/gardening: Edible crop focus versus general ornamental/outdoor gardening.
We diagnose your sick plants!
When to choose it: A plant looks sick and you want diagnosis help.
Why it is here: Verified SFW community (about 776k members) whose public title frames plant diagnosis. Complements gardening when the thread is triage, not general technique.
How it differs from r/gardening: Diagnostic clinic format versus broad gardening discussion.
The Reddit For Landscapers
When to choose it: Yards, beds and landscape work (including professional context) are the topic.
Why it is here: Verified SFW community (about 1.7M members) titled for landscapers. Useful when hardscape/yard design outgrows general gardening threads.
How it differs from r/gardening: Landscape and yard systems, often prosumer/pro, versus home plant care.
Run the automatic finder for r/gardening (results are matched from our directory; that page is not indexed): Find related to r/gardening.
Members and public descriptions come from SubMouse's safe-for-work directory (as of 2026-11-02 UTC); 7-day growth measured from 2026-10-26. Posts/day and culture claims appear only when we have them — missing fields stay n/a. Directory rank is listing order. Communities outside the published Top 100 open in the info tool instead of a full community page. Guide updated 2026-11-06.