Greenly Garden
Get the app
EN

When to plant crocuses in Trenton: 13 October – end of December

In Trenton, crocus: plant from 13 October to the end of December. For planting stock, the places nearby include Trenton Organics (garden centre, 4 km) and Longford Garden Center (garden centre, 5 km); addresses and opening hours are below.

Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

The average daily temperature here stays above 0 °C all winter, and at least three months average 7 °C or less: our rule of thumb for the winter cold spring bulbs need. Sources: Iowa State University Extension, Wisconsin Horticulture Extension, UNH Extension, RHS.

Crocus in Trenton: soil, season and weather

Nights then average below 0 °C in December–February; the coldest, January, averages -2.7 °C.

Planting13 October – end of December
First autumn frost12 November
Coldest nightsJanuary, -2.7 °C
Soil back at 1 °C in springalready in the first week of January
Daylight11:17 on 13 October
Daylight at the winter solstice9:18

The same dates in Trenton hold for Garlic, Tulip, Daffodil and Hyacinth.

Crocus in Trenton: depth, winter cold, pests and pets

Plant Dutch crocuses (Crocus vernus) about 12 cm deep and 9 cm apart; smaller species go 7–10 cm deep (RHS).

In Trenton the average daily temperature stays at 10 °C or lower for about 21 weeks a year (our estimate from ten years of monthly weather). For this bulb Wisconsin Horticulture Extension gives a cold period of 15–17 weeks at about 2–10 °C. The winter here gives that in the ground, so the bulbs need no pre-chilling.

Crocuses multiply on their own (they naturalise); in a lawn, hold off mowing until their leaves die back (RHS).

Birds, squirrels and rodents damage crocuses; planting under metal mesh may reduce losses (RHS). Spring crocus gives dogs and cats vomiting and diarrhoea; do not confuse it with autumn crocus (Colchicum), which is very toxic (Pet Poison Helpline).

Sources: RHS, Wisconsin Horticulture Extension, Pet Poison Helpline.

Crocus in nearby cities

Around Trenton, Allentown is 9 days earlier and Dover 14 days later.

CityDistanceDateDifference
Philadelphia45 km12 October – end of December1 day earlier
Allentown73 km4 October – 30 December9 days earlier
New York84 km21 October – end of December8 days later
Atlantic City100 km23 October – end of December10 days later
Dover134 km27 October – end of December14 days later
Baltimore188 km23 October – end of December10 days later

Where to buy crocus for planting in Trenton

Planting stock goes into the ground from 13 October to the end of December; buy it before that. Within 15 km of Trenton OpenStreetMap lists 6 garden centres, 1 farm-supply shop, 3 plant nurseries, 5 markets and 3 farm shops (collected 28 October 2026).

Places: © OpenStreetMap contributors, ODbL.

Questions

When to plant crocuses in Trenton?

In Trenton, crocus: plant from 13 October to the end of December. Bulbs are best planted early in the window: late-planted bulbs may flower later or less well. Late planting works only while the soil can be dug. Mulch after planting.

When is the last spring frost in Trenton?

Last spring frost around 6 April, first autumn frost around 12 November.

Other crops in Trenton, with their dates