Potato, Lookin’ Llumpy

True potato seed information and growing instructions

Potato products and sizes

True potato seeds are classified as breeding seeds and germination is not guaranteed.

This is an OSSI open source variety. Click for more information about open source seeds.

Phytosanitary information

TPS is a regular offering and should be in stock most years. In vitro plantlets and tubers may be offered occasionally.

Lookin’ Llumpy is one of the first promising results from a project attempting to produce a potato similar to the famous Andean variety Llumchuy Waqachi that will grow better in the long days of summer in North America.  This is definitely an improvement, although not everything that I want.  It grows larger tubers, earlier, and with a much better yield.  It has beautiful red flesh and good flavor.  The cross that produced this variety was Loowit x (GB seedling x Llumchuy Waqachi) and the name reflects that parentage.

Reproducibility Score: 20

Practicality Score: 70

Culinary Traits

This is a thick-skinned, starchy potato that makes a good baker.  At full maturity, tubers fall into the 3-8 inch range, with many reaching 8-12 ounces.  They get impressively lumpy as they grow larger, but smaller tubers are less remarkable.  Flavor is good, strong but not bitter, and texture is on the starchy side.  When cooked, the flesh becomes uniformly pink.

Agronomic Traits

This is a late variety with excellent yields.  The 2022 harvest averaged 4.7 pounds per plant and 2023, which was a little drier and warmer, averaged 4.2.  Tuber dormancy is intermediate.  Stolons are short and tubers cluster closely under the base of the plant.  Plants are very large and I would not space them any closer than 12 inches.  Skin is normally netted under my conditions.  Fairly vulnerable to common scab under dry conditions, a trait that is unfortunately common in progeny of Loowit.  On the other hand, it appears that it may have some resistance to powdery scab.  This is a tetraploid variety and is self-fertile.  Plants flower moderately and set plenty of seed, but considerably more with some pollination help, at least under my conditions.

True Seeds (TPS)

True seed of this variety was open pollinated.  It grew in a block with other progeny of Llumchuy Waqachi.  A majority of the seed is likely to be self pollinated, but there should be a fair amount of outcrossing as well.  In previous batches of related varieties, I found that about a quarter of the progeny produced the same kind of lumpy, deep-eyed form as the parent.