Climate-based bean planting guide for Dauphin, Manitoba
When to Plant Beans in Dauphin: Timing and Maturity Guide
Beans are usually a practical fit in Dauphin, though this is still a crop that rewards timely planting and sensible variety choice, especially among very early to late varieties.
Typical Planting Window
Use the planting dates below for beans in Dauphin.
Gardeners usually sow outdoors around May 21. Most varieties need about 50–65 days to reach maturity.
Beans are generally practical in Dauphin, especially when gardeners plant on time and stay close to very early to late varieties.
Within Manitoba, Dauphin usually provides bean a cooler seasonal runway than many comparable locations. That makes local site warmth more important than it would be where the seasonal margin is wider.
Best local strategy: Sow on time, use reliable varieties, and protect early momentum.
Can Beans Mature in Dauphin?
Growing degree days measure how much useful warmth the season provides. For warm-season crops like beans, GDD helps show whether local heat accumulation is usually strong enough for the crop to grow steadily and finish before fall.
From the usual planting window, Dauphin typically provides about 1066 growing degree days for beans. With a typical crop target of 900, that leaves a heat margin of +166. That heat margin usually gives the crop enough room to finish, but not so much that delays stop mattering. Timing and variety choice still affect how comfortably the crop fits.
GDD Checkpoints for Dauphin
If planting later than usual, this table shows how much growing degree day heat is still available from each point in the season. It is most useful for judging how much flexibility you still have before the crop starts losing margin.
| Checkpoint | Remaining GDD | Heat margin | Fit vs typical target |
|---|---|---|---|
| Apr 15 | 1089 | +189 | Comfortable |
| Jun 1 | 1044 | +144 | Usually fits |
| Jun 15 | 943 | +43 | Usually fits |
| Jul 1 | 777 | -123 | Usually short |
Best Bean Varieties for Dauphin
In Dauphin, very early to mid-season bean varieties are usually the best fit in a typical year. Slower choices can still work when gardeners want their specific qualities and do not give away margin through delay.
Varieties that often fit well here include:
- Provider — a dependable early bean often chosen where cool starts and shorter seasons are common
- Mascotte — compact and relatively quick, making it useful where gardeners want a fast return
- Contender — valued for earliness and steadiness, especially in variable conditions
- Blue Lake — a classic bean with strong garden appeal when the season comfortably supports it
- Kentucky Wonder — productive and popular, though it benefits from a decent amount of warm weather
- Roma II — a reliable Italian-type bean that usually works well where planting is timely
| Variety class | Typical days to maturity | Typical GDD need | Local fit |
|---|---|---|---|
| Very early | 45–52 | 725 | Good fit |
| Early | 50–55 | 800 | Good fit |
| Mid-season | 55–65 | 900 | Workable |
| Late | 65–75 | 1000 | Tight |
Main risk: This crop generally fits, but slower bean varieties can run into trouble if planting is delayed or early growth stays cool and slow.
How Frost Affects Beans in Dauphin
Dauphin usually has about 122 frost-free days, with a typical last spring frost around May 21 and a typical first fall frost around September 20.
Beans are generally frost-tender and temperatures below about 32°F ( 0 °C) can slow growth or damage plants.
Beans are much more exposed to frost risk, so the frost dates matter as real planting boundaries rather than rough planning markers.
The usual trouble comes from delayed planting or from choosing slower varieties when the local season would reward simpler, faster choices.
In Dauphin, the season is usually supportive for beans, though warmer sites still help with how comfortably they finish before fall frost around September 20. Season length is often limited by late spring and an early-closing fall window, especially for warm-season crops. In practical terms, the best spots are usually south-facing walls, raised beds, sheltered backyards, and urban heat pockets. Cooler spots like open windy yards, low frost pockets, and exposed sites that lose heat quickly are more likely to stay cooler and be less forgiving. For beans, the main benefit is often faster early growth followed by steadier pod production from warmer soil.
Related crops
Related crops worth comparing for the same city:
For a broader local overview, see the Dauphin planting guide. You can also use the Growing Degree Day Planner to test planting dates and crop timing.