Participant Page


2025 Gardening Challenge!

World wide heirloom seed trials 2025

Welcome to the Challenge!

This year for our warm season seed trials we will be growing Armenian cucumber. We have participants from all over the United States, as well as many from abroad.

This is a collaborative effort to further the development of this particular variety for hardiness, as well as disease & drought resistance in regions with adverse climatic conditions.

Participants range in experience from beginner to expert & everything in between.

We encourage participants to interact with each other throughout the growing process by sharing experiences, photos, & videos on the Facebook group page.

Our horticulturalist, plant geneticist & growers will monitor the trial & engage with participants via the group page, providing help when needed.

Growing information will be provided here, so check in for answers to your questions first.

Getting Started

Once you receive your seeds, the first consideration is when you should plant them.

Too early, & you run the risk of the seeds not germinating due to low temperatures or soggy wet conditions.

Too late, & you might run the risk of not having enough time for the cucumbers to produce by the time fall frost hits. This is mostly a concern for those who garden in areas with short growing seasons.

Direct sow, or start indoors?

Cucumbers are normally direct sown in the garden after all risk of frost has passed & soil temperature at the planting depth reaches at least 70 degrees F. Starting indoors is generally not recommended because cucumber roots are very sensitive, & therefore don't handle transplanting well.

However, we have been successful in transplanting Armenian cucumbers before, although it is not the preferred method.

You have been provided enough seeds to try it both ways, & that will add significantly to the data we collect from the trial.

Many of you garden in areas that would not normally support optimal growth of Armenian cucumbers, but our plant geneticist believes that this variety has the potential to thrive in adverse conditions such as colder climates. If not, he will work further towards achieving that goal.

We encourage you to attempt both direct sowing, & starting indoors if you have the means to do so.

Starting Indoors

note: Always label with dates! It will be helpful for sure.
cucumber seeds germinating in paper towels
Moist Paper Towel

Fold a paper towel in half, then fold it in half again to make a square. Place in a small plastic container (don't need a lid) & place seeds in between the folds. Saturate the paper towel with water, but there should be no water pooled up in the container. We want the seeds to be moist, but we don't want to drown them. Don't let the paper towel dry out at any point during the germination process!

cucumber seeds sprouting
Monitor Seeds For Sprouting

Be VERY careful unfolding the paper towel to check for sprouting after 3 days. It will likely take longer to see sprouts (maybe even a couple weeks), but we don't want them to sprout & grow into the paper towel before we notice them.

using toothpick to make hole for planting
Prepare Soil

Water the soil prior to planting (moisten).
As seeds sprout (they won't all sprout at the same time), plant them in soil in a cellular pot or something similar. Six packs or 50 cells work best. The cells are roughly the size of a shot glass. Any container will do, but the size of a shot glass is what we need. Use a toothpick to create a hole about 1/2" deep to set the seed in.

sprouted cucumber seed
Be Gentle!

Avoid touching the root at all cost. Be extremely gentle with the sprouted seed. Lay it on its side in the bottom of the 1/2" deep hole.

covering sprouted cucumber seed with soil
Cover The Seed

Very carefully (gentle) cover the seed with the toothpick. Don't pack the soil down at all, just very gently push soil over the top to fill the hole.

watering seedling with turkey baster
Water In

A turkey baster works well for watering in. Just a little water to cave the soil in around the seed slightly so it contacts the seed. Be gentle, & don't flood the soil too much.

What does "leggy" mean?

This is a term that is way overly used on internet forums. If you spend about half a second scrolling through social media post, you will likely see this term used about ten times. While this is a term occasionally used by professionals, it is generally used in reference to very particular plants. As an example, a professional would never call a young tomato plant leggy. This is because it is expected that a tomato seedling or young tomato plant have a long bendy main leader.
When transplanted into the garden this is actually a very desirable trait, because if planted deep the plant will send out roots horizontally at lighting speed. This gives the plant a significant head start as opposed to a short stalky plant.
Retailers tend to stock tomato plants that are stalky due to the appeal to the beginner consumer, but an experienced gardener is not looking for this trait (nor would they likely be purchasing their plants from a retail store).

Unlike tomatoes, cucumbers do NOT like to be planted deeper than the original soil line in the pot that they were started in.
This can lead to problems with rot. 

Cucumbers are not usually started indoors in the first place. It is highly likely that someone will call your cucumber plants leggy. Armenian cucumbers take off very rapidly after germination. Being that they are vines, they are going to be long & floppy anyway.

The best practice is to provide as much light as absolutely possible.
Natural light is always better than artificial light. Artificial light is a compromise, but sometimes it is a necessity.
 
Your seedlings will likely need support. A small diameter stake in the pot will suffice. Be very careful not to mar the plant when tying it to the stake (tie loosely). Also, be careful not to damage the roots when staking the plant. It is best to do it early & keep the stake on the edge of the pot rather than right in the middle.

Armenian cucumber seedlings in greenhouse
Armenian cucumber seedlings started in a greenhouse under strong natural light. Note that they are long & floppy, despite having been provided fairly optimal conditions.

Direct Sow

Sow directly in the garden after all danger of frost has passed.

Plant in hills with 4 seeds in each hill.
For our beginners, it is important to note that planting in hills does not mean literal mounds. This is a term used widely by gardeners simply meaning that multiple seeds are planted in the same hole. Your "hills" will be flat, level with the adjacent dirt just like the rest of your garden rows.

Plant seeds roughly 1/2" deep.

Space hills at least 36" apart from one another.

Armenian cucumber seeds germinate best at 70 degrees Fahrenheit.
It is important to wait for the ground to reach this temperature at the planting depth or seeds may not germinate. Technically, they will germinate at temperatures as low as 60 degrees, but they tend to take more time which leaves them vulnerable to pest damage among other things.
Remember that we are talking about the soil temperature at the planting depth, not ambient air temperature.

A food thermometer is helpful for determining soil temps.

Food thermometer for testing soil temperature
Thermometer cost less than $5usd
Food thermometer showing 70 degrees F soil at planting depth
70 degrees F at planting depth

Grow in the garden, raised beds, or containers?

Armenian cucumbers can be grown in many different ways. The sky is the limit.

The biggest consideration to take into account is space. Armenian cucumbers require quite a bit of space to grow.

If growing in the garden on the ground, they can be planted no less than 36" apart, but they will sprawl quite a bit more than that so provide plenty of room.
Trellising provides space for them to grow up, & allows for a significant decrease in the footprint needed for each plant. Still keep to the 36" spacing, but they will not need any extra room sprawl.

Growing in containers requires trellising.
Containers need to be large enough to support the plants vast root system. A five gallon bucket is the bare minimum sized container (larger is better). Whatever container you use, be sure that it is as deep as possible, & at least 12" wide. Wider is better! Armenian cucumber roots don't tend to go very deep, but they love to spread horizontally.
Make sure there are ample drain holes in the bottom of your container. Armenian cucumbers can't stand having wet feet, therefore the soil needs to dry out sufficiently on a daily basis.
Use a good quality potting mix, avoiding soils containing fertilizers all together. Do not attempt to grow in coconut coir by itself unless you are growing hydroponically. Many beginners have been using straight coconut coir as a growing medium. It is meant to be used as an additive to potting soil at no more than a 30% rate. The rest of the mix needs to be soil, decomposed organic matter, & possibly perlite.

Aphids

Will be added during trial.

Cucumber Beatles

Will be added during trial.

Squash Bugs

Will be added during trial.

Leaf Miners

Will be added during trial.

Pickle Worms

Will be added during trial.

Downy Mildew

Will be added during trial.

Powdery Mildew

Will be added during trial.

Nematodes

Will be added during trial.

Poor Germination

Poor germination is generally due to soil temperatures not being warm enough at the planting depth at the time of seeding. Armenian cucumber seeds require 70 degrees F at the planting depth to germinate reliably.

Another common issue is the ground staying too wet or too dry. Seeds tend to "drown" when the ground stays saturated for extended periods of time. The inverse can also be an issue. If there is not sufficient moisture, the seed will not germinate. The longer the seeds are in the ground prior to germination, the more prone they are to damage from pest.

Armenian cucumbers are notorious for germination issues with beginner gardeners. They are less forgiving than other cultivars when it comes to the conditions required for reliable germination.

Damping Off

Will be added during trial.

tomato with blossom end rot
watermelon with blossom end rot
eggplant with blossom end rot
tomato with blossom end rot

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We donate tens of thousands of seeds to seed libraries nation wide every year.

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