Plant Potatoes on These 20 2026 Dates for Giant Harvests That Last Through Spring

Store-bought potatoes get the job done, but homegrown has that flavor and smug satisfaction money can not buy. The trick is timing. In 2026, the smart move is to plant by soil temperature first, then sanity-check your dates with local climate, a couple of time-tested folk cues, and (if you are into it) the moon.

Start with the soil, not the calendar

The baseline: at a depth of 10-12 cm, the soil should be holding steady at about 8-10 °C (roughly 46-50 °F). Warmer than that, and the seed tubers wake up and root fast. Colder, and you are just parking them in a fridge.

What the calendar looks like by region

• South of Russia: Early varieties go in from late March. Mid-season types land in April. Late varieties are usually skipped here because they struggle to finish in time.
• Central Russia: The sweet spot runs from late April to mid-May. Most people plant in the first 10 days of May, adjusting to actual weather rather than wishful thinking.
• North-West (Leningrad region and nearby): Early varieties in the first half of May. Mid-season in the second half of May. Anything later gets pushed to June.
• Urals, Siberia, Far East: Plant from late May into early June. Do not drag your feet here; summer is short and unforgiving.

Folk signs that actually help

These did not appear out of nowhere; they mirror real patterns in spring.

Birch leaves are a great tell. When a birch leaf has opened to about the size of a small coin (roughly 1-1.5 cm across), it is go time for planting. If that leaf is already about the size of a 5-ruble coin, you are late.

Another reliable marker: once the bird cherry finishes blooming, you are at the cutoff. Planting after that usually is not worth the effort.

Lunar calendar for 2026 (if you track it)

Potatoes are root crops, and gardeners who follow the moon tend to favor the waning phase, when energy is said to pull downward toward the roots. On the waxing moon, potatoes have a habit of channeling more into foliage than tubers.

Favorable planting days in 2026: April 29, 30; May 1, 2, 6, 7, 11, 12, 19, 20, 26, 27, 28, 29, 30; June 2, 3, 4, 7, 8, 12.

One timing caveat you should not ignore

Important: Mid-season and late varieties need a proper runway. Even if the lunar calendar smiles on a date in late June, planting that late can leave you with tubers that never size up before autumn. If you want those types to finish, shift earlier within your safe window.