Last edited on March 01, 2020. View history
Yellow Fir Potato
A variety of potato
How to sow yellow fir potato: Direct seed outdoors after last frost. Each piece must have one eye.
Sun requirement for yellow fir potato: Plant in Full Sun
(early short season cultivar) Similar to Pink Fir, but with yellow skin, outstanding long smooth-skinned buttery potatoes, make excellent potato salad, cam here with our Irish ancestors!
This line is the same as La Ratte, a traditional French potato that has been in New Zealand for a long time. It is very very similar to Yellow Fir, a yellow waxy finger type, that produces all it's potatoes right beside the stem in one pile. They are buttery delicious. An early cropper. also called Lady Finger.
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Yellow fir potato facts
Lifespan
Crop cycle
Max altitude
Optimal light
What are growing degree days?
A plant grows with warmth, not with days. A growing degree day is one day's worth of useful warmth: how many degrees the day's average temperature is above the lowest temperature the crop grows at. Add them up from planting and you know how far along the crop is, whatever the calendar says.
Say that lowest temperature is 10°C. A day averaging 17°C gives 7 growing degree days. A day averaging 8°C gives none, as it is too cold for the crop to grow. That is why the same lettuce takes about 50 days in a summer and 90 in an autumn: it needs the same total warmth either way.
For yellow fir potato, the FAO EcoCrop database gives a lowest growing temperature of 7°C and a shortest growing cycle of 90 days at its best temperature, about 1170 growing degree days to a first harvest.
Where you've told us where your garden is, we use this and the weather there to predict when your yellow fir potato will be ready to harvest. We don't use it for how long a plant lives or when it finishes: we go by what members have logged for that.
Growing yellow fir potatoes
- Sit seed potatoes in the light to sprout 4 weeks before planting out
- Dig compost into the bed 1 week before planting out
- Earth up the shoots 3 weeks after planting out every 2 weeks
- Check the leaves for blight 5 weeks after planting out every 2 weeks
- Water in dry weather 6 weeks after planting out every week
- Dig the first new potatoes at first harvest
- Lift the main crop 6 weeks after first harvest
- Dry the potatoes and store them in the dark 7 weeks after first harvest
Plant yellow fir potatoes with
eggplant
marjoram
Video
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Ecological requirements
Data from the FAO EcoCrop database for Solanum tuberosum L.
| Family / Taxonomy | Magnoliopsida Asteridae Solanales Solanaceae |
|---|---|
| Killing temperature | growth: 0 °C, rest: -1 °C |
| Life form | herb |
| Life span | annual |
| Habit | erect |
| Optimal soil depth | medium (50-150 cm) |
| Optimal soil texture | medium, organic |
| Optimal soil fertility | moderate |
| Optimal soil drainage | well (dry spells) |
| Optimal soil salinity | low (<4 dS/m) |
| Photoperiod | short day (<12 hours), neutral day (12-14 hours), long day (>14 hours) |
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