If you’ve ever had fungus gnats, mystery mold, damping-off, or seedlings that suddenly flop over for no good reason… there’s a good chance your pots and trays had a little “leftover history” on them. The good news: you don’t need fancy products or a full afternoon of scrubbing to reset your containers. You just need a simple routine that’s easy enough to actually do. Especially in January when we’re prepping for seed starting season. Below is a beginner-friendly method that works for pots, seed trays, cell inserts, humidity domes, and saucers. 𝐖𝐡𝐲 S𝐚𝐧𝐢𝐭𝐢𝐳𝐢𝐧𝐠 M𝐚𝐭𝐭𝐞𝐫𝐬 (𝐢𝐧 𝐩𝐥𝐚𝐢𝐧 𝐄𝐧𝐠𝐥𝐢𝐬𝐡) Old pots and trays can carry: * fungus and mold spores * algae film * fertilizer salts (that crusty white stuff) * pest eggs/larvae hiding in creases * disease organisms from last season’s plants Sanitizing helps reduce problems before they start. Especially for seed starting, where young plants are extra sensitive. 𝐖𝐡𝐚𝐭 𝐘𝐨𝐮’𝐥𝐥 𝐍𝐞𝐞𝐝 (𝐤𝐞𝐞𝐩 𝐢𝐭 𝐬𝐢𝐦𝐩𝐥𝐞) Pick what you already have: * Dish soap + warm water * A scrub brush or old sponge * A tub/sink/bucket * One sanitizer option (choose ONE): * 𝐁𝐥𝐞𝐚𝐜𝐡 (fast + very effective) * 𝐇𝐲𝐝𝐫𝐨𝐠𝐞𝐧 𝐩𝐞𝐫𝐨𝐱𝐢𝐝𝐞 (easy, less stinky) * 𝐖𝐡𝐢𝐭𝐞 𝐯𝐢𝐧𝐞𝐠𝐚𝐫 (fine for mineral buildup, lighter-duty for sanitizing) * 𝐓𝐡𝐞 “𝐄𝐚𝐬𝐲 𝐖𝐚𝐲” 𝐌𝐞𝐭𝐡𝐨𝐝 (𝐂𝐥𝐞𝐚𝐧 → 𝐒𝐨𝐚𝐤 → 𝐃𝐫𝐲) 𝐒𝐭𝐞𝐩 𝟏: 𝐒𝐡𝐚𝐤𝐞, 𝐝𝐮𝐦𝐩, 𝐚𝐧𝐝 𝐫𝐢𝐧𝐬𝐞 (𝟐 𝐦𝐢𝐧𝐮𝐭𝐞𝐬) * Dump old soil and roots * Knock off loose debris * Rinse pots/trays with water 𝐓𝐢𝐩: If it’s caked-on, let it soak in plain water for 10 minutes first. 𝐒𝐭𝐞𝐩 𝟐: 𝐖𝐚𝐬𝐡 𝐰𝐢𝐭𝐡 𝐬𝐨𝐚𝐩𝐲 𝐰𝐚𝐭𝐞𝐫 (𝐭𝐡𝐞 𝐩𝐚𝐫𝐭 𝐭𝐡𝐚𝐭 𝐚𝐜𝐭𝐮𝐚𝐥𝐥𝐲 𝐦𝐚𝐭𝐭𝐞𝐫𝐬) Sanitizers don’t work well through dirt. So do a quick scrub first: * Add a few drops of dish soap to warm water * Scrub the inside, bottom, and drainage holes * Rinse This step alone fixes a surprising number of issues. 𝐒𝐭𝐞𝐩 𝟑: 𝐂𝐡𝐨𝐨𝐬𝐞 𝐲𝐨𝐮𝐫 𝐬𝐚𝐧𝐢𝐭𝐢𝐳𝐞𝐫 𝐬𝐨𝐚𝐤 (𝐩𝐢𝐜𝐤 𝐨𝐧𝐞) 𝐎𝐩𝐭𝐢𝐨𝐧 𝐀: 𝐁𝐥𝐞𝐚𝐜𝐡 𝐬𝐨𝐚𝐤 (𝐛𝐞𝐬𝐭 𝐟𝐨𝐫 “𝐈 𝐰𝐚𝐧𝐭 𝐢𝐭 𝐭𝐫𝐮𝐥𝐲 𝐜𝐥𝐞𝐚𝐧”) * Mix 1 part bleach to 9 parts water (a 10% solution) * Soak pots/trays 10 minutes * Rinse well * Air dry completely 𝐁𝐞𝐬𝐭 𝐟𝐨𝐫: seed trays, domes, anything that previously had disease, or if you’ve had damping-off.