Eureka
An internationally established cultivar long grown in Himachal Pradesh orchards alongside Franquette, cited in regional variety comparisons for the state's hill districts.
Quick facts
- Crop
- Walnut (Akhrot)
- Type
- Grafted plant
- Season
- All seasons
- Starts bearing
- First bearing in 4–5 years (grafted)
- Expected yield
- Good under Himachal Pradesh conditions
- Suitable soil
- Deep, well-drained loam; pH roughly 6.0–7.5; does not tolerate waterlogged or heavy ground
- Disease resistance
- Not specifically documented for Indian conditions
- Release
- A long-established international cultivar, not an ICAR or Indian release
Actual yield depends on sowing time, soil, irrigation, weather, seed quality and crop management.
About this variety
Eureka is a walnut variety from outside India that has long been grown in Himachal Pradesh's hill orchards, alongside Franquette. It is not an ICAR or Indian release. Less is published about how it performs here than for the newer Indian releases: we found no India yield, nut-size, flowering-type or resistance figure for it. Its value is its local record, so look at Eureka trees in neighbouring orchards before you buy. Check plant supply with the state horticulture department or a KVK, and buy budded plants from a named mother tree.
Should you pick this variety?
Choose Eureka only if you are in Himachal Pradesh and can see healthy Eureka trees cropping in a neighbouring orchard. It has a long planting history there but we found no India yield, nut-size, flowering-type or resistance figure for it. If you want documented numbers, SKUAST-Kashmir's Hamdan and Sulaiman (Kashmir) or SKUAST-Jammu's Parbat (Jammu region) have more published. If frost is your worry, Franquette has a clearer reason to choose it: late leafing.
Sowing & cultivation
- Spacing8 × 8 m under traditional planting; confirm current local spacing practice with your state horticulture department
- FertilizerA balanced NPK dose while young, moving to a higher, pre-spring-growth-and-post-harvest-split dose once bearing, following general temperate nut-tree practice in the absence of an India-specific schedule (see the crop guide)
Pest & disease considerations
Major diseases
Major pests
- Walnut aphid
- Codling moth
Advantages & considerations
Why farmers may choose it
- A long planting record in Himachal Pradesh's hill-district orchards, alongside Franquette.
- You can see mature Eureka trees cropping in local orchards before you decide.
Things to consider
- Less is published for Eureka than for the newer Indian releases. Treat its international name as a starting point, not a guarantee.
- Confirm plant supply and trueness to type with a reputable Himachal Pradesh nursery before planting at scale.
Suitable regions
An internationally established cultivar long grown in Himachal Pradesh's hill-district orchards alongside Franquette and other proven cultivars.
- Himachal Pradesh
Choosing among Himachal's walnut varieties
Eureka has little published India data, so the way to choose it is to look. A commercial farming guide for Himachal Pradesh lists Wilson, Gobind, Placentia, Eureka, Franquette and Kashmir Budded as the varieties grown there. That guide is not an extension recommendation and we found no state variety list to confirm it, but it shows that Eureka is one of several local options, not the only one. Walk two or three nearby orchards in the same altitude band. Note which trees are healthy, how heavy the crop looks, and how the nuts crack out.
Then ask about the plant itself. The same guide gives 10 × 10 m for grafted walnut and 12 × 12 m for seedling trees, so decide spacing on what mature trees near you have actually needed. The Nauni note (Indian Farming, June 2025) adds that most Indian walnut orchards came from ordinary seedlings, not improved varieties, so some trees sold or labelled as Eureka may not be. Buy budded plants from a nursery that can name the mother tree, and compare with Franquette if frost is the problem you most need to solve.
Where the planting material comes from
This variety is a grafted plant: the variety on top, joined onto a rootstock below. Seed out of its fruit will not come up as this variety, so it cannot be kept as seed. Buy grafted plants from a registered nursery or a government farm, so the plant is true to the variety and free of disease.
How it compares with other varieties
Every Walnut (Akhrot) variety with a page on this site, side by side. The row for this page is highlighted.
| Variety | Best for | Starts bearing | Yield | States |
|---|---|---|---|---|
| CITH Walnut-6 | Farmers who want a large-nut ICAR-CITH selection and will first confirm its release status and plant supply | First bearing in 4–5 years (grafted) | No yield-per-tree figure found; large nut (about 24 g) | Jammu and Kashmir, Himachal Pradesh, Uttarakhand |
| CITH Walnut-8 | Kashmir valley farmers aiming at the graded kernel trade, where size and light colour set the price | First bearing in 4–5 years (grafted) | Good, with an emphasis on large nut and kernel size | Jammu and Kashmir |
| Eurekathis page | Himachal Pradesh farmers who can see healthy Eureka trees in nearby orchards and want to match a local record | First bearing in 4–5 years (grafted) | Good under Himachal Pradesh conditions | Himachal Pradesh |
| Franquette | Frost-prone higher orchards in Himachal Pradesh, where late leafing protects the crop | First bearing in 4–5 years (grafted); late-leafing/flowering | Good, internationally proven, though no India-specific yield figure is confirmed here | Himachal Pradesh |
| Hamdan | Kashmir valley farmers who want a proven local grafted walnut with a good kernel share | First bearing in 4–5 years (grafted) | High — around 5 kg dry in-shell nut/mature tree by SKUAST-Kashmir's own evaluation figures | Jammu and Kashmir |
| Parbat (JWSP-06) | Farmers in the Jammu region's hills who want a recent SKUAST-Jammu release with a published yield and kernel figure | First bearing in 4–5 years (grafted) | 90 kg of nuts a tree and a 53.28% kernel share in SKUAST-Jammu's release list; tree age not stated | Jammu and Kashmir |
| Sulaiman | Kashmir valley farmers who care more about in-shell nut yield than the last point of kernel share | First bearing in 4–5 years (grafted) | High — around 5–6 kg dry in-shell nut/mature tree by SKUAST-Kashmir's own evaluation figures | Jammu and Kashmir |
Tools for this crop
The numbers you need next: how much seed to buy, whether the lot germinates, what the fertilizer bill looks like and what Walnut (Akhrot) is selling for.
- Seed Rate CalculatorHow much seed your Walnut (Akhrot) plot needs, corrected for the germination of the lot you bought.
- Seed Variety FinderFilter every Walnut (Akhrot) variety on this site by state, season, duration and soil.
- Fertilizer CalculatorTurn the NPK recommendation for Walnut (Akhrot) into bags of urea, DAP and MOP for your field size.
- Crop Profit CalculatorPut your seed, labour and input costs against the yield you expect from this variety.
- Mandi Price CheckerToday's Walnut (Akhrot) rate in your nearest mandi, before you fix a price with a trader.
Subsidy and government support
Schemes that help with the cost of Walnut (Akhrot) seed or planting material. Rules and the application route are on each scheme page.
Frequently asked questions
Is Eureka a good choice for a new walnut planting today?
It is still planted in Himachal Pradesh's existing orchards, but India-specific performance data is thinner for it than for newer releases like Hamdan, Sulaiman or Parbat. For a new planting, compare Eureka's local record with the better-documented figures of a named release, and confirm current recommendations with your state horticulture department.
Which other walnut varieties are grown in Himachal besides Eureka?
A commercial farming guide for Himachal Pradesh lists Wilson, Gobind, Placentia, Eureka, Franquette and Kashmir Budded. That guide is not an extension recommendation, and we found no state variety list from the horticulture department that confirms it. Franquette is the one with a stated trait (late leafing). Ask the Himachal horticulture department or Nauni which of these they currently give out as budded plants.
How do I check that an Eureka plant is true to type?
Young walnut plants of different varieties look alike, so the check is the paperwork and the source. Buy only budded plants, and ask the nursery for the mother tree's location so you can see the tree and its nuts. The Nauni note (Indian Farming, June 2025) says there are not enough mother trees of standard varieties for scion wood, so a claim of a large stock deserves questions. Keep the tag and the bill.
How far apart should Eureka trees be planted?
We use 8 × 8 m. A commercial farming guide for Himachal Pradesh gives 10 × 10 m for grafted walnut and 12 × 12 m for seedling trees; it is not an extension recommendation. We found no Eureka-specific spacing. Look at how close the crowns of mature Eureka trees in your area now are, and plan the gap from that.
Does Eureka need a second variety for pollination?
We could not find Eureka's flowering type in what we could read, so we cannot say whether it opens pollen or female flowers first. Walnut has both flower types on one tree and a single variety can bear, but a second variety with overlapping bloom can improve nut set. Ask a neighbouring farmer which variety stands beside their Eureka, or ask the nursery.
Why does a grafted Eureka matter if most walnut trees are seedlings?
The Nauni note says most Indian walnut orchards were raised from ordinary seedlings, not improved varieties, so many trees give uneven yield, nut size and growth. A seedling called Eureka would not carry Eureka's nuts. A budded plant does, because the bud comes from a named tree. That is why the source tree matters more here than the name on the tag.
Sourced from: Walnut Farming in India: Popular Varieties & Growing Advice — BookMyCrop, National workshop on Promotion of Walnut and Almond in Himachal Pradesh, Dhiman, Rohiwala and Dev, Chip budding techniques for walnut — Indian Farming 75(6), June 2025 (Dr YS Parmar University, Nauni), Walnut Farming Guide (commercial guide; spacing and Himachal variety list, not an extension recommendation) — AgriFarming. editorial policy.