UPL Sp 3 Sweet Potato: Yield, Maturity and Characteristics
UPL Sp 3 is a registered sweet potato variety. The Philippine Seed Board approved it in 1983. It takes 100 to 135 days from planting to harvest, with 17.7 tonnes per hectare on average in the trials.
The average and top yields in tonnes per hectare come from the trials each variety went through to be registered with the NSIC, and from what the seed companies say about their own seed.
What farmers harvest today can be different. Newer harvest records, the season, the place, the soil, the water and the care all move these numbers over time.
So use them to compare varieties, not as a promise for your field. Ask your seller or your agriculturist how the variety did on farms near you in the last few seasons.
Compare it with the others in our sweet potato variety finder, or see every crop variety we list. For the crop itself, read our guide: Land preparation for root crops.
- Days to harvest: 100 to 135 days from planting to harvest.
- Yield: 17.7 tonnes per hectare on average in the trials.
Key facts about UPL Sp 3 sweet potato
| Trait | What the record shows |
|---|---|
| Registration | Philippine Seed Board |
| Year approved | 1983 |
| Days to harvest | 100 to 135 days |
| Average yield | 17.7 t/ha |
| Dry matter content | 37.5 |
| Starch content | 30 percent |
How long does it take, and how much does it yield?
UPL Sp 3 sweet potato takes 100 to 135 days from planting to harvest. That is 3 days longer than the average of the 26 sweet potato varieties with a day count, 114.5 days. A shorter crop frees the field sooner and dodges more of the weather, while a longer one often fills more.
Its average yield of 17.7 t/ha beats the average of its group, 15.15. It sits in the top quarter of its group. Trial yields come from well managed plots, so your own will depend on water, fertilizer, pests and timing.
Once you know the day count, anee.io dates every task from each lot's own planting day, with the growth stages and weather beside it.
Is it resistant to pests and diseases?
| Pest or disease | Rating | What it means |
|---|---|---|
| Scab | Resistant | Held up well |
It showed no weak spot in the ratings on record. Still, a resistant variety can break down when a new strain or pest population comes, so keep scouting.
The pests and diseases that hit sweet potato fields most often: root knot nematode. Our pest finder and disease finder help you name what you see.
What the root is like
Dry matter is 37.5 percent. A higher dry matter cooks mealy and gives processors more flour or starch from each tonne. The starch content is 30 percent.
Where and when to plant UPL Sp 3 sweet potato
Pick by use and market: yellow or orange flesh for snacks and fries, purple for processing, white for boiling. Weevils are the main enemy, so plant clean cuttings and harvest on time.
Before you buy seed
- Buy sealed packs or tagged sacks from an accredited dealer, and check the packing date and germination rate.
- Ask your municipal agriculturist or nearby farmers how it did in your area last season.
- Try it on a small area first, beside the variety you usually plant, before you switch the whole farm.
- Write down the planting day, inputs and harvest, so you can compare varieties on your own ground. anee.io keeps these records for you.
Set the planting day of each lot and anee.io dates every task to harvest, with the weather beside it. Free on the Libre plan.
Start freeSweet potato varieties like this one
These are the closest matches among the sweet potato varieties we list. So if seed of this one is hard to find, compare these first.
- BPI Sp 1: 100 to 135 days, 18.5 t/ha, 1983
- VSp 1: 100 to 135 days, 21.9 t/ha, 1983
- VSp 2: 100 to 135 days, 19 t/ha, 1983
- VSp 3: 100 to 135 days, 16 t/ha, 1983
How long does it take to harvest?
What is its yield?
Where can I buy seed of UPL Sp 3?
See how UPL Sp 3 will do on your farm
With Libre + Anee, see its full record: how it yields, its strengths and weaknesses against pests, diseases and the weather, and whether it fits your farm, your season and your soil.
The account is free, no credit card.
