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When to plant garlic in Santa Rosa: 14 May – end of June

In Santa Rosa, garlic: plant from 14 May to the end of June.

Garlic is best planted early in the window: cloves planted late make smaller bulbs. Late planting works only while the soil is not frozen. Mulch after planting.

The average daily temperature here stays above 0 °C all winter, and at least two months average 10 °C or less: the cold garlic needs, one to two months at 0–10 °C (RHS). The two-month threshold is our rule of thumb. Sources: UVM Extension, UNH Extension, RHS.

Garlic in Santa Rosa: soil, season and weather

Garlic goes into the ground in Santa Rosa from 14 May to the end of June; the window opens a month before the first autumn frost. No month averages below 0 °C at night; the coldest nights, in July, average 3.9 °C.

Planting14 May – end of June
First autumn frost13 June
Coldest nightsJuly, 3.9 °C
Soil back at 5 °C in springalready in the first week of July
Harvest (card)about 8 months after planting: January
Daylight10:13 on 14 May
Daylight at the winter solstice9:39

The same dates in Santa Rosa hold for Tulip, Daffodil, Crocus and Hyacinth.

Garlic in Santa Rosa: care after planting

Planted on 14 May: in the first weeks water every 7 days.

Feeding, by the card’s schedule from that day:

  • 14 May — feed: nitrogen
  • 11 June — feed: nitrogen

Pests and diseases of garlic to watch for:

Dates count from the first planting day of the window above; a later planting moves them by as many days.

Garlic in nearby cities

Around Santa Rosa, San Rafael is 8 days earlier and San Luis 10 days later.

CityDistanceDateDifference
Bahía Blanca293 km16 May – end of June2 days later
Río Cuarto388 kmby 15 May1 day later
San Luis414 km24 May – end of June10 days later
Neuquén421 km10 May – end of June4 days earlier
San Rafael428 km6 May – end of June8 days earlier
Rosario527 kmby 16 May2 days later

Where to buy garlic for planting in Santa Rosa

Planting stock goes into the ground from 14 May to the end of June; buy it before that. Within 15 km of Santa Rosa OpenStreetMap lists 2 garden centres, 4 farm-supply shops, 2 plant nurseries and 1 market (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant garlic in Santa Rosa?

In Santa Rosa, garlic: plant from 14 May to the end of June. Garlic is best planted early in the window: cloves planted late make smaller bulbs. Late planting works only while the soil is not frozen. Mulch after planting.

When is the last spring frost in Santa Rosa?

Last spring frost around 25 August, first autumn frost around 13 June.

Other crops in Santa Rosa, with their dates