Journal/Care Basics · 5 min read
Top vs Bottom Watering: Which Is Better?
Bottom watering is having a moment. Here's the honest comparison — pros, cons, and which method your specific plant should get.
Quick answer
Both work if done right. Top watering flushes salts from the soil and mimics rain; bottom watering (soaking the pot in a tray for 15–30 minutes) guarantees the whole root ball is hydrated and keeps leaves dry. Most plants do best on a mostly-bottom, occasionally-top rotation.
The 'bottom watering' trend is more than a hashtag — for certain plants and setups it genuinely gives you healthier roots. But it has one crucial downside almost no one talks about.
How each method works
Top watering: pour water onto the soil surface until it runs from the drainage hole. Wait 10 minutes, then tip out excess. Bottom watering: place the pot in a tray, saucer, or sink filled with 2–3 cm of water; the pot wicks moisture upward through the drainage hole. Remove when the top layer of soil feels damp — usually 15–30 minutes.
Pros and cons at a glance
Top vs bottom watering
| Factor | Top watering | Bottom watering |
|---|---|---|
| Even root hydration | Sometimes patchy | Very even |
| Flushes salts | Yes (great) | No — salts build up |
| Wet leaves risk | Yes | No |
| Works with fine soil / crust | Poor | Excellent |
| Time / effort | Fast | Slower, must monitor |
| Fungus gnats | Encourages them | Discourages them |
When to prefer bottom watering
- Plants with fuzzy leaves (African violet, calathea, gynura) that hate water on foliage.
- Peat-based soil that has dried out and gone hydrophobic — top water just rolls off.
- Fungus-gnat infested pots — dry top layer breaks the gnat life cycle.
- Anyone who forgets to come back and drain the saucer 10 minutes after top watering.
When to prefer top watering
- Every 4–6 waterings, to flush out mineral salts from fertiliser and hard tap water.
- Very large or heavy pots you can't lift into a tray.
- Plants that appreciate a leaf rinse (Monstera, ficus) to knock off dust and pests.
The routine that works for most plants
Bottom water 4 times in a row, then top water once to flush the soil. Never let a plant sit in water for more than 30 minutes — a soaked root ball for hours becomes root rot.
PlantMe adjusts your watering reminders to whichever method you use, so the intervals stay right.
Frequently asked questions
How long should I bottom water?
15–30 minutes is enough for most 10–15 cm pots. When the top layer of soil feels damp, the whole root ball is wet.
Do I need to flush the soil if I bottom water?
Yes, every 4–6 waterings. Salts otherwise concentrate at the top of the pot and burn roots.
Can I bottom water succulents?
You can, but they don't love it — succulents prefer a full soak-and-dry from the top. Bottom watering can leave the top layer too dry and the bottom too wet.
Try it yourself
Diagnose it instantly with PlantMe
Snap a photo of any plant or leaf. Get the species, the diagnosis, and a care plan in seconds.
Download on theApp Store