Which humidor jobs have a published interval?
Only one job on this calendar has a maker's interval behind it: Boveda says to calibrate a hygrometer every six months. Every other interval is ours, a rule of thumb built from how fast each humidity source runs down, and the schedule labels it that way.
| Job | Interval | Where it comes from |
|---|---|---|
| Calibrate the hygrometer | Every 6 months | Boveda, the pack maker, publishes this interval. |
| Read the hygrometer | Every 3 to 14 days | Our rule of thumb, tighter for a box opened daily or a season that swings. |
| Squeeze-test packs | Every 2 or 4 weeks | Our check interval. Integra gives an opened pack a couple of months to a year. |
| Check and recharge beads | Every 2 to 4 weeks | Our check interval. Heartfelt says to add water when the beads need it. |
| Top up sponge or foam | Every 2 to 4 weeks | Our rule of thumb. No maker publishes a fixed schedule. |
| Refill an electronic unit | Weekly, clean monthly | Our rule of thumb. Your unit's manual comes first. |
| Re-seasoning check | Every 6 months, wood boxes | Our rule of thumb, offset three months from calibration. |
| Beetle check | Every 2 weeks in warm months | Our rule of thumb, timed by UF/IFAS temperature data. |
The makers do publish what to look for. Integra's indicator card dot turns bright blue when a pack is spent. Heartfelt's beads turn bright white when dry, and it suggests keeping about 80 to 90% of them clear. Our intervals just make sure somebody looks.
A hygrometer you never check is decoration
Reading the hygrometer is the job that catches every other problem early. A pack going stiff, a sponge drying out, a lid that stopped sealing: each one shows up as a falling number first.
Weekly suits most boxes. Open the lid every day and the moisture leaves faster, so check every few days. A box you rarely touch can go two weeks. Then twice a year, test the gauge itself with the hygrometer calibration calculator. Boveda's method is 24 hours sealed with a 75% pack at 65 to 75°F.
Dry winters drain a humidifier faster
Heated indoor air in winter is dry, so every humidity source in the box works harder and empties sooner. Pick dry winters and the calendar tightens pack, bead and sponge checks to every two weeks.
Humid summers cut the other way. The box loses less water, so refills come less often. The risk shifts from dry cigars to mold and bugs, which is why the beetle season runs longer for that climate. Electronic units are their own case: refill with distilled water only, since the EPA notes that tap-water minerals build scale inside humidifiers.
Beetle season follows the thermometer
Tobacco beetle eggs hatch and grow in warmth, so the calendar asks for beetle checks only in the warm months. The University of Florida's extension sheet reports that the cigarette beetle cannot complete development at 62.6°F, and that the cycle takes about 120 days at 68°F but only 26 at 98.6°F.
The months are our call: June to August for a steady climate, May to September for dry winters, and April to October for humid summers. Find a pinhole and read what to do about cigar beetles.
Re-season a box that dried out
A wooden humidor that sat empty or read low for a week has dry cedar again, and dry cedar takes water from cigars. Twice a year the calendar asks whether that happened. If it did, run the seasoning planner before the cigars go back in. Tupperdors and coolers have no wood to season, so they get a quick airing reminder instead.
Getting the reminders onto your phone
The calendar file is a standard iCalendar file, the format Apple Calendar, Google Calendar and Outlook all read. On a Mac or iPhone, open it and Calendar adds the events. In Outlook, open it or drag it in. Google Calendar imports it from the web version's settings, and the events sync to the phone.
Each job is one repeating event, not dozens of loose ones, so deleting a job removes all its dates at once. Your choices are remembered in this browser only.
Humidor upkeep schedule questions
How often should you check a humidor?
Read the hygrometer about once a week, and every few days if you open the box daily or the weather is very dry or humid. That is our rule of thumb, not a maker's rule.
Do you need to recalibrate a hygrometer every year?
Twice a year is the published interval. Boveda advises calibrating every six months, plus once before a new hygrometer goes in the box.
How long does a two-way humidity pack last?
Integra puts an opened pack at a couple of months to a full year. It says the moisture in the area matters, and a container opened often uses a pack up faster.
Can I add the reminders to Google Calendar on my phone?
Import the file on a computer instead. Google Calendar takes calendar files through its web settings, under Import, and the events then sync to the phone app.
Where the care intervals come from
- How do I calibrate my hygrometer?, Boveda
- FAQ: how long a Boost pack lasts, replacement indicator card, Integra Products
- FAQs: bead color, 80 to 90% clear, distilled water only, Heartfelt Industries
- Cigarette beetle, Lasioderma serricorne (EENY-227), University of Florida IFAS Extension
- Indoor Air Facts No. 8: Use and Care of Home Humidifiers, US EPA