How to Water Potted Plants While Away
Potted plants come in every size, from a 10 cm herb pot to a half-metre floor planter, and the right way to water potted plants while away depends almost entirely on which end of that range you’re dealing with. A system that perfectly suits a desk succulent is wrong for a large fiddle-leaf fig, and vice versa. This guide covers how to water potted plants while away by container size, matching each pot to the system that fits it.
THE SHORT VERSION
01 · THE PROBLEM
Why pot size decides everything
A potted plant’s water budget is set by its container: a small pot holds little and dries in days, a large planter holds more and lasts longer. Watering potted plants while away is therefore a sizing exercise — the reservoir has to match both the soil volume and the trip length, or the plant runs dry regardless of how good the method is.
This is why one system doesn’t fit all pots. A terracotta spike’s 17.5 oz reservoir is ideal for small and medium pots but can’t supply a large planter’s soil volume for long. A buried olla’s 1.25 gallons suits big planters but is overkill — and physically too large — for a small pot. Match the system to the container and the problem solves itself.
02 · HOW LONG
How long do potted plants last by size?
Small pots dry fastest — a 10 cm pot can run dry in two to three days. Medium pots hold for several days to a week; large planters can last a week or more on their own soil moisture alone.
Sizing the reservoir to extend that: an AcquaTerra spike keeps small-to-medium potted plants watered 10–16 days. For large floor planters where a spike can’t keep up, a buried Acqua Olla’s 1.25-gallon reservoir waters for 20–35 days — the correct tool for the largest potted plants on longer trips while away.
03 · THE OPTIONS
Systems by pot size
The right way to water potted plants while away is chosen by container size first, method second. Here’s the match-up.
01 · Terracotta watering spike
Small–medium pots
The AcquaTerra suits pots up to ~25 cm. Self-regulating clay; 17.5 oz reservoir lasts 10–16 days.
02 · Buried olla
Large planters
A 1.25-gallon Acqua Olla buried in a big planter waters 20–35 days — the right capacity for large soil volumes.
03 · Two spikes per pot
Medium-large pots
For pots in between, two spikes roughly double the reservoir and distribute water more evenly through the root zone.
04 · Plastic globe
Unreliable
Releases on air pressure, not soil moisture. Empties fast or clogs. Inconsistent across pot sizes.
Spikes cover small and medium pots; ollas cover large planters; two spikes bridge the gap for medium-large pots.1 All three use the same porous-clay principle, releasing water only as the surrounding soil dries — they differ in capacity, not mechanism.
04 · THE SETUP
Setup — sized to the pot
For small-to-medium potted plants, install the AcquaTerra in about five minutes per pot; its 17.5 oz reservoir covers 10–16 days. For large planters, bury an Acqua Olla up to the neck and fill its 1.25-gallon reservoir for 20–35 days of coverage.
01 · Soak the spike
Submerge the terracotta in water for 15 minutes to prime the porous clay before installing.
02 · Water the pot
Give the plant a normal thorough watering first. The spike maintains moisture — it doesn’t rescue dry soil.
03 · Make the hole
Use the included wooden dibber to open a hole near the pot edge, away from the main stem and roots.
04 · Insert & fill
Seat the spike, firm the soil around it, then fill the 17.5 oz glazed reservoir to the top.
05 · Cap & group
Close the lid to keep bugs out, then group pots together out of direct sun to slow water loss.
For longer trips
Three weeks or more? Run two spikes per pot and move plants away from windows to extend the reservoir.
05 · THE PREP
A pre-trip checklist
Whatever the pot size, these adjustments lower water demand so the reservoir lasts longer. Apply them on departure day.
- Move plants out of direct sun. Bright indirect light keeps plants alive without driving the rapid transpiration that empties a reservoir early.
- Lower the thermostat a few degrees. Cooler rooms transpire more slowly, so the same reservoir lasts noticeably longer.
- Group pots together. Clustered plants raise the humidity around one another, slowing evaporation from soil and leaves alike.
- Skip fertilizer before you leave. Don’t feed within a couple of days of departure; concentrated feed in drying soil can scorch roots.
- Water thoroughly on departure day. A self-watering spike maintains moisture; it works best starting from a properly watered pot.
06 · WHEN IT GOES WRONG
Troubleshooting by pot size
A small pot that dried out needed a spike it may not have had room for — group small pots in a shallow tray with a shared water source instead. A large planter that dried despite a spike needed an olla’s capacity. Soggy soil in any pot means over-supply; a self-regulating spike corrects this automatically. Match the fix to the pot size.
How to water potted plants while away is decided by the container before the method. Size a terracotta spike to small and medium pots, a buried olla to large planters, and two spikes to the awkward middle. Match the reservoir to the pot and the trip, lower demand with shade and grouping, and every potted plant is covered.
FAQ · COMMON QUESTIONS
Frequently Asked Questions
How do you water potted plants while away?
Match the system to the pot size. Use a terracotta watering spike for small-to-medium pots and a buried olla for large planters. Both release water through porous clay as the soil dries, keeping potted plants watered for one to five weeks depending on the system.
How long can potted plants go without water?
It depends on pot size: a small pot may dry in two to three days, a large planter in a week or more. A filled AcquaTerra spike keeps small-to-medium pots watered 10–16 days; a buried olla extends large pots to 20–35 days.
What size watering system do potted plants need?
Small-to-medium pots (up to ~25 cm) suit a single terracotta spike; medium-large pots need two spikes; large floor planters need a buried olla with its 1.25-gallon reservoir. Sizing the reservoir to the soil volume is the key to keeping potted plants watered while away.
Can a watering spike handle a large potted plant?
A single spike can’t supply a large planter’s soil volume for long. Large pots need two spikes, or better, a buried olla whose 1.25-gallon capacity matches the bigger soil volume and lasts 20–35 days. Reserve single spikes for pots up to about 25 cm.
How do you water small potted plants on vacation?
Small pots dry fastest, so group them together in a shallow tray and use a terracotta spike in each, or a shared wick reservoir. Grouping raises humidity and slows drying. Keep them out of direct sun, since small pots have the least margin before running dry.
Do large potted plants need more than one watering spike?
Yes — large pots over 25 cm typically need two spikes to supply enough water and distribute it evenly. For very large floor planters, a single buried olla is usually more practical and longer-lasting than multiple spikes competing in the same soil.
Should you move potted plants indoors before a trip?
Moving outdoor potted plants into shade or indoors reduces their water demand sharply, since they’re no longer exposed to sun and wind. For a long trip, relocating thirsty potted plants to a cool, bright-but-indirect indoor spot can meaningfully extend how long a reservoir lasts.
What’s the best way to water potted plants for 3 weeks?
For three weeks, use a buried olla in large pots (20–35 days) and two terracotta spikes in smaller ones, paired with deep shade and grouping. The olla’s large reservoir is the most reliable single solution for big potted plants over a three-week absence.
References
01 Bainbridge, D. A. (2001). “Buried clay pot irrigation: a little known but very efficient traditional method of irrigation.” Agricultural Water Management, 48(2), 79–88. DOI: 10.1016/S0378-3774(00)00119-0
02 University of Minnesota Extension. “Watering houseplants.” UMN Extension. extension.umn.edu