How to Keep Potted Plants Watered While Away
Potted plants are entirely dependent on the water held in their container, which makes keeping potted plants watered while away a question of reservoir size more than anything else. A small herb pot and a large floor planter have very different needs, and the right system scales to match. This guide covers how to keep potted plants watered while away across pot sizes, with a terracotta spike for most pots and a buried olla for the largest.
THE SHORT VERSION
01 · THE PROBLEM
Why potted plants run dry while away
A potted plant lives on a fixed water budget — the volume its container holds and no more. The smaller the pot, the smaller the budget and the faster it empties; warmth and sun accelerate the loss. Keeping potted plants watered while away is therefore mostly about matching a reservoir to the pot: enough capacity, releasing slowly, for the whole trip.
Quick fixes ignore both capacity and release rate. A pre-trip soak drains within hours regardless of pot size. Bottles dump at once. Standing water rots roots. A terracotta watering spike regulates the release — the clay gives up moisture only as the soil dries — and for very large pots, a buried olla adds the capacity a single spike can’t.
02 · HOW LONG
How long can potted plants go without water?
It depends on pot size and plant type. A small 10 cm herb pot can dry in two or three days; a large floor planter holds moisture for a week or more. Succulents stretch any timeline; thirsty tropicals shorten it.
An AcquaTerra spike’s 17.5 oz reservoir keeps small to medium potted plants watered for 10–16 days. For large planters where that isn’t enough, a buried Acqua Olla holds 1.25 gallons and releases over 20–35 days — the better tool for keeping big potted plants watered while away on longer trips.
03 · THE OPTIONS
Systems for potted plants, by size
The right system for keeping potted plants watered while away depends mostly on pot size. Here’s how the options compare.
01 · Terracotta watering spike
Small–medium pots
The AcquaTerra suits pots up to roughly 25 cm. Porous clay self-regulates; a 17.5 oz reservoir lasts 10–16 days.
02 · Buried olla
Large planters
For big floor pots and planters, a buried Acqua Olla holds 1.25 gallons and waters for 20–35 days from one fill.
03 · Plastic globe
Unreliable
Releases on air pressure, not soil moisture. Empties fast or clogs. Inconsistent across pot sizes.
04 · A friend with a key
Variable
Works if reliable, but people unfamiliar with your potted plants tend to over- or under-water them.
For most pots, the terracotta spike is the most forgiving choice; its clay self-regulates with no moving parts.1 For the largest planters, the buried olla’s greater capacity wins on duration. Both rely on the same porous-clay principle — water moves out only as the surrounding soil dries.
04 · THE SETUP
Setup — 5 steps for potted plants
The AcquaTerra installs in about five minutes per pot; its 17.5 oz reservoir covers roughly 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
Beyond the right-sized reservoir, these adjustments keep potted plants watered longer on the same fill. 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
Wilted but recoverable potted plants mean the reservoir was too small for the pot — size up, or add a second spike. Soggy soil and yellow leaves mean over-watering: check the spike and the drainage. For large planters that dry out despite a spike, switch to a buried olla for the extra capacity those pots demand.
How to keep potted plants watered while away is fundamentally a sizing problem: match the reservoir to the pot. A terracotta spike covers small and medium pots for one to two weeks; a buried olla covers large planters for three to five. Choose by pot size, slow the water loss with shade and grouping, and every potted plant is covered.
FAQ · COMMON QUESTIONS
Frequently Asked Questions
How do you keep potted plants watered while away?
Install a pre-soaked terracotta watering spike with a filled reservoir in small to medium pots, and a buried olla in large planters. The porous clay releases moisture as the soil dries, keeping potted plants watered for one to five weeks depending on the system and pot size.
How long can potted plants go without water?
It depends on pot size: a small herb pot may dry in two to three days, a large planter in a week or more. With a filled AcquaTerra spike, small to medium potted plants stay watered 10–16 days; a buried olla extends large pots to 20–35 days.
What’s the best self-watering system for potted plants?
For most pots, a terracotta watering spike like the AcquaTerra — it self-regulates and fits standard containers. For large floor planters, a buried Acqua Olla holds far more water (1.25 gallons) and lasts 20–35 days, making it the better choice for big pots.
Do watering spikes work for all pot sizes?
Spikes work well in pots up to about 25 cm across. Larger planters need either two spikes or a higher-capacity solution like a buried olla, because a single 17.5 oz reservoir can’t supply a large soil volume for long enough.
How many spikes do you need for a large potted plant?
A large pot over 25 cm typically needs two terracotta spikes to supply enough water and distribute it evenly. For very large floor planters, a single buried olla with its 1.25-gallon reservoir is usually more practical than multiple spikes.
Should you bottom-water potted plants before leaving?
A thorough top or bottom watering on departure day is ideal — it ensures the soil starts fully moist. The self-watering spike or olla then maintains that moisture. Don’t leave pots standing in water, though, as prolonged saturation rots roots.
Can potted plants survive 2 weeks without watering?
Most can with a self-watering system. A filled AcquaTerra spike covers small to medium potted plants for around two weeks; large planters need a buried olla. Without a system, only succulents and other drought-tolerant potted plants reliably last two weeks.
What’s the difference between watering globes and spikes?
A terracotta spike releases water through porous clay as the soil dries, so it self-regulates. A glass or plastic globe releases on air pressure, tending to empty quickly or clog with soil. The spike is far more consistent for keeping potted plants watered over a week or more.
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