Top vs bottom watering: which is better for houseplants?
There’s a small, surprisingly heated debate in plant care: should you water from the top, the way it rains, or from the bottom, letting the pot soak up water through its drainage holes? The honest answer is that both work, and the best routine often uses each for what it’s good at.
Top watering
Pouring water onto the soil surface until it drains out the bottom — the classic method.
Strengths:
- Flushes the soil. Water moving down and out carries away excess fertiliser salts and minerals.
- Fast and simple, especially for big plants you can’t lift.
Weaknesses:
- Can channel down one side, leaving dry pockets if the soil has pulled away from the edges.
- Wets the crown and foliage of plants that resent it (some are prone to rot or spotting).
Bottom watering
Standing the pot in water and letting the soil draw it up through the drainage holes.
Strengths:
- Even, thorough soaking — the whole root ball drinks, with no dry pockets.
- Keeps foliage and crowns dry — ideal for African violets, begonias, and fuzzy-leaved plants.
- Encourages roots downward toward the water.
- Hard to overwater in the moment — the soil takes only what it can hold.
Weaknesses:
- Slower, and impractical for very large pots.
- No flushing, so salts build up over time.
How to bottom water
- Stand the pot in a tray, bowl, or sink with about 2–3 cm of water.
- Leave it 10–30 minutes, until the top of the soil feels damp to the touch.
- Lift the pot out and let it drain fully — never leave it sitting in water.
When to use each
| Situation | Better method |
|---|---|
| Fuzzy or rot-prone foliage (African violet, begonia) | Bottom |
| Soil that’s gone hydrophobic and repels water | Bottom (rehydrates evenly) |
| Routine watering of small/medium plants | Either |
| Large, heavy plants | Top |
| Flushing out fertiliser salts | Top |
The best of both
A practical routine: bottom water most of the time for even soaking and dry foliage, then top water thoroughly once a month or so to flush accumulated salts down and out. That combination gives you the strengths of each and cancels their weaknesses.
The honest summary
Top watering flushes; bottom watering soaks evenly and keeps leaves dry. Pick by plant and situation, and flush the soil from the top periodically whichever you favour.
Whatever method you use, the timing question remains — when. LeafPal records each plant’s watering method and reminds you when it’s due, so the technique you’ve chosen actually gets used on schedule.