Garlic

Ilocos Tan Bolters Garlic (Tan Bolters): Yield, Maturity and Characteristics

Ilocos Tan Bolters is a registered garlic variety, also sold or known as Tan Bolters. It was registered with the National Seed Industry Council in 2017 as NSIC 2017 Gr 06. It takes about 110 days from planting to harvest, with 3,530 kilograms per hectare on average in the trials.

5 min read Updated October 23, 2026 By the anee.io agriculture team Read it all with Libre + Anee
Onion plants in beds separated by grassy paths on a Philippine farm, the kind of farm where Ilocos Tan Bolters garlic is grown
Photo: Zarate123, CC BY SA 4.0, via Wikimedia Commons

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.

If you came here looking for Tan Bolters, this is the same garlic. Its seller and farm sources add notes, listed at the end. Compare it with the others in our garlic variety finder, or see every crop variety we list. For the crop itself, read our guide: Land preparation for onion and garlic.

  • Days to harvest: about 110 days from planting to harvest.
  • Yield: 3,530 kilograms per hectare on average in the trials.
  • Recommended for: the areas in its trials, in the dry season.

Key facts about Ilocos Tan Bolters garlic

Key facts of Ilocos Tan Bolters
TraitWhat the record shows
RegistrationNSIC 2017 Gr 06
Year approved2017
Also known asTan Bolters
Days to harvestabout 110 days
Average yield3,530 kg/ha
SeasonThe dry season
Size (75 days after planting) height (cm)58.14 (60 DAP)
Foliage colorGreen
Shape of Bulbs dryGlobe
Shape of Bulbs matureGlobe
Color of skin cloveBrown
Color of skin outerWhite with brown stripes
Bulb structureMulti shelled

How long does it take, and how much does it yield?

Ilocos Tan Bolters garlic takes about 110 days from planting to harvest. That is 3.7 days faster than the average of the 7 garlic varieties with a day count, 113.7 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 3,530 kg/ha trails the average of its group, 5817.14. Trial yields come from well managed plots, so your own will depend on water, fertilizer, pests and timing. Its seller gives about 110 days after planting, trials give 105 to 120 days.

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?

Reactions in trials, rated under natural field conditions
Pest or diseaseRatingWhat it means
Purple blotchModerately resistantTook some damage but held up
Cercospera leap spotModerately resistantTook some damage but held up
Fusarium bulb rotModerately resistantTook some damage but held up
ThripsModerately resistantTook some damage but held up
Leaf folderModerately resistantTook some damage but held up
MitesModerately resistantTook some damage but held up

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. Read up on purple blotch of onion, thrips.

The pests and diseases that hit garlic fields most often: Cercospora leaf spot, cutworm, Fusarium wilt, onion armyworm, purple blotch of onion. Our pest finder and disease finder help you name what you see.

What the harvest is like

It is globe.

What its seller and farm sources say

  • Yield: 3.53 t/ha in the data.
  • Fruit: Globe bulb, brown clove skin, white outer skin with brown stripes, cloves bigger than Ilocos White.
  • Season: Dry season.
  • Moderately resistant to purple blotch, Cercospora leaf spot, Fusarium bulb rot, thrips, leaf folder and mites.
  • Keeps well.
  • The guide had not yet recommended it officially for commercial planting.

Why farmers know it: MMSU variety registered with NSIC in 2017, the guide notes its cloves are bigger than Ilocos White's. Check these against what farmers near you have seen, because the same variety can do differently from one town to the next.

Where and when to plant Ilocos Tan Bolters garlic

It is recommended for the dry season. Native Ilocos garlic is small but strong in flavor and keeps well. Plant cloves from a clean, local source after the rains, because garlic needs the cool, dry months. Before planting, get the field ready with our guide: Pagtatanim ng gulay.

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.
Plan your next garlic season

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 free

Garlic varieties like this one

These are the closest matches among the garlic varieties we list. So if seed of this one is hard to find, compare these first.

Is Tan Bolters the same as Ilocos Tan Bolters?
Yes. Tan Bolters is another name for Ilocos Tan Bolters, registered as NSIC 2017 Gr 06. Seed sellers use both, so ask for either one.
How long does it take to harvest?
It takes about 110 days from planting to harvest. Then the weather and your care decide the exact day.
What is its yield?
The record shows 3,530 kilograms per hectare on average in the trials. Your own yield depends on the soil, water, fertilizer and pests on your farm.
Where can I buy seed of Ilocos Tan Bolters?
Ask an accredited seed dealer in your province, the seller named on this page or your municipal agriculturist. Look for the certified seed tag or a sealed pack before you pay.

See how Ilocos Tan Bolters 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.