Can I post as a professional grower?
No, the community is for home growers only and professional growers are not allowed.
Subreddit guides
r/hydro rules, stats, and what to post
A source-backed Rankhog guide to r/hydro: public rules, community context, posting fit, and startup-promotion risk before you publish.
By Anthony Riera, founder and operator of Rankhog.
Subreddit guides combine public Reddit source URLs, captured rules, visible verification dates, and Rankhog's account-safety workflow.
Current public stats
- Members
- 133,076
- Verified
- September 16, 2026
- Category
- Cannabis cultivation communities
Rules can change, so Rankhog keeps verification dates and the original public Reddit sources visible.
Rule summary
- No Advertising or Direct Linking (Unless specifically requested.): No Advertising or Direct Linking (Unless specifically requested do not direct link to products or websites. This rule is in place to prevent spamming links unprompted/unrequested. Someone MUST request a link for a product, website, etc. before you can send it.) No links in your post or pics to any social media accounts.
- No Stolen Content, Bot Posts, AI posts: No Stolen Content, Bot Posts, AI posts
- No YouTube link posts.: No YouTube link posts. (It's fine to link to a YouTube video if someone asks in a reply. No starting a new post with your video. You are welcome to post a video directly on the page that is not linked through a third party. (This can be seen as advertising linking from YouTube directly.)
- Be Civil (No Harassment - Personal Attacks - Insults): Be Civil (No Harassment - Personal Attacks - Insults) If you're attacked by someone, please report it to the mods, and do not respond to the attacker.
- No buying, selling, trading: No buying, selling, trading, giving, asking for seeds, weed, clones, extracts, equipment. No asking prices. No discussion about clones and seeds and suppliers
- No bud porn, karma farming, or low effort posts.: Posts should encourage conversation. Posting bud porn, karma farming, "is it ready" trichrome questions, and low effort posts will be removed
- No asking for DM: No asking people to message. Too many people have come in here asking to DM for sales
- Hydroponic grows only: Hydroponics only. Coco coir is acceptable as long as salt based nutrients are used. If you add worm castings or other organic material to coco or peat it is not considered hydroponic in this sub. Soil grows should be posted in r/microgrowery
- Off topic post: Please keep posts on topic. Non hydroponic related content will be removed. This includes asking where to get seeds
- Sub is for home growers only. No professional growers: Sub is for home growers only. No professional growers
Works well
- Share a photo based grow journal of your hydroponic cannabis setup with details about your nutrients and environment, and invite discussion.
- Ask a specific technical question about your hydroponic system, such as nutrient levels or water temperature.
- Upload a video directly to the platform showing your hydroponic grow process, with no links to YouTube or external sites.
- Reply to another user with a helpful answer, and only share a product or website link if that user explicitly asks for it.
Avoid
- Do not start a new post with a YouTube link, but you can share a YouTube video in a reply if someone asks for it.
- Do not link to products or websites unless another user specifically requests the link.
- Do not post AI generated content or bot posts.
- Do not ask people to DM you.
- Do not post soil grows or organic coco setups, as the community is for hydroponic grows only.
- Do not post bud porn, karma farming, or low effort posts like asking if a plant is ready based on trichomes.
What r/hydro Is For
This community is for hydroponic cannabis gardeners who want to post grow journals, questions, and discussions. It is for home growers only, not professional growers. The focus is strictly on hydroponic setups, with coco coir allowed as long as you use salt based nutrients.
Rules That Matter Before Posting
The rule named No Advertising or Direct Linking (Unless specifically requested.) is the one that decides whether a marketing-adjacent post survives, because it blocks direct links to products or websites unless someone explicitly asks for them. The rule named No YouTube link posts. matters too, since you cannot start a post with a YouTube link. The rule named No Stolen Content, Bot Posts, AI posts matters if you are thinking about using AI generated text. The rule named No buying, selling, trading matters because any commercial intent around seeds, clones, extracts, or equipment will get removed. The rule named Hydroponic grows only matters because anything outside true hydroponics, including soil or organic coco, will not survive. The rule named Sub is for home growers only. No professional growers matters because it keeps the room closed to commercial operations.
What To Post
A good post here is a genuine grow journal or a specific question about a home hydroponic cannabis setup. You could share photos of your hydroponic grow and describe your nutrients, your lighting, and your environment. You could ask a detailed question about a problem you are facing in your hydroponic system. If you want to share a video, upload it directly to the platform rather than linking to YouTube. Only share a product or website link if another user explicitly asks for it in a reply.
What To Avoid
Avoid any advertising or direct linking to products or websites unless someone specifically requests a link. Do not start a new post with a YouTube link. Avoid AI generated content and bot posts. Do not buy, sell, trade, give, or ask for seeds, weed, clones, extracts, equipment, or prices. Do not ask people to DM you. Avoid posting soil grows or organic coco setups. Do not post bud porn, karma farming, or low effort posts like asking if a plant is ready based on trichomes.
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Common questions about r/hydro
Can I share my YouTube video about hydroponics?
No, you cannot start a new post with a YouTube link. You may share a YouTube link in a reply only if someone asks for it, or upload a video directly to the platform.
Can I link to my hydroponic product or website?
No, you cannot direct link to products or websites unless someone specifically requests the link in a reply.
Is coco coir considered hydroponic here?
Coco coir is acceptable as long as you use salt based nutrients. If you add worm castings or other organic material to coco or peat, it is not considered hydroponic in this community.
Can I ask where to get seeds or discuss suppliers?
No, buying, selling, trading, giving, or asking for seeds, weed, clones, extracts, equipment, or prices is not allowed.
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