English 
A tester pack is the smallest sensible way to try a variety you are curious about. Instead of committing to a full pack. You take one or two seeds and find out what the line does in your own space.
That sounds like a small thing. However, it changes how a grower builds a shortlist, because trying something no longer means replacing a whole season’s plan.
This guide covers what a tester pack is good for, where it falls short. And how to get a useful answer out of one or two plants.
What a tester pack is for
The purpose is information rather than harvest. In practice, you are buying an answer to a question: does this line suit my space. My season and my taste?
That question cannot be answered by a description. Therefore, a couple of seeds grown properly tells you more than a week of reading forum threads.
It also lowers the cost of being wrong. As a result, a grower can be curious without gambling the whole run on an unfamiliar name.
What one or two plants can actually tell you
A small test answers some questions well and others badly. In practice, it is reliable on timing, structure and smell.
You learn when the plant finishes in your climate. Moreover, you learn how tall it gets, how it branches, and whether it needs support.
Aroma comes through clearly as well. By contrast, yield figures from one plant mean very little. Because a single plant reflects its pot, its light and its position more than its genetics.
Where a tester pack falls short
Two seeds are two siblings, not a representative sample. Therefore, an unlucky pair can make a good line look mediocre.
Weather adds its own noise. Meanwhile, a cold, wet finishing fortnight will make any variety look worse than it is.
That is why one test is a hint rather than a verdict. In addition, a line worth keeping usually earns a second run before it joins the regular list.
How to make a small test worth something
The value of a test depends entirely on the notes you keep. Therefore, three dates per plant are the minimum: sowing, first flowers, harvest.
Grow the tester beside something you already know well. As a result, the familiar plant becomes a yardstick and the comparison means something.
Keep the conditions ordinary. In practice, testing a new line in the middle of changing your setup produces an answer about the setup instead of the seeds.
Using a full pack as the follow-up
Once a line passes the first test, a full pack is the natural next step. Moreover, several plants let you see the range within the variety rather than one example of it.
That is also where selection starts. Furthermore, growers who keep notes often find one plant in a pack that suits their space noticeably better than its siblings.
Dessert-profile lines reward that patience. For instance, Wedding Cake feminized shows noticeable variation between siblings in structure and finish.
Which varieties are worth testing first
A test is most useful when the line is genuinely unfamiliar. However, there is a case for testing a well-known classic too, simply to calibrate your own space.
Big, heavy producers are good test subjects because they expose a space’s limits. For example, Big Bud feminized quickly shows whether your airflow and support are up to the job.
Short-cycle plants give the fastest answer of all. In practice, Zkittlez Autoflower returns a verdict in about ten weeks from seed.
A simple testing routine
Treat each test as one question rather than several. Therefore, write the question down before sowing: will this finish before October here?
Sow the tester and the reference plant on the same day. As a result, the weather and the room affect both equally.
Record the answer in one line at harvest. In practice, a notebook with a sentence per variety becomes the most valuable thing in a grower’s shed after two seasons.
Does a small test save money overall?
Usually, yes. Therefore, one disappointing tester costs far less than a full season built around an unknown line.
Should I change anything in my setup while testing?
Better not. In practice, changing two things at once makes the result impossible to read.
How long before I trust a new variety?
Two runs is the usual answer. Moreover, the second run is where the first season’s weather stops distorting the picture.
Can I test several varieties at the same time?
You can, as long as they share the same conditions. By contrast, staggering the sowings muddies the comparison.
What should I write down at harvest?
Dates, final height and one sentence on aroma. Furthermore, a note on the last fortnight of weather explains most surprises.
Does a tester plant need the same care as a full grow?
It needs ordinary care. Therefore, treating it as an experiment to neglect produces a result about neglect.
Is a mixed selection a good way to start?
It is a reasonable way to find a direction. Still, a mix tells you less per plant than a deliberate pair.
Should I keep a cutting from a tester?
Only if your setup supports it. In practice, most growers simply note the result and buy a full pack later.
Do siblings differ enough to matter?
They differ in vigour, height and finishing time. As a result, one plant is a sample of the line rather than the line itself.
When is a test a waste of time?
When the question is vague. Meanwhile, a specific question such as “does this finish by week nine” always returns something useful.
Does testing indoors tell me about outdoors?
Partly, on structure and aroma. However, timing and resilience only show up in the real season.
What is the single most useful habit here?
Keeping a reference plant you know well in every run. Therefore, every new line gets measured against something stable.
Is a tester better sown indoors or outdoors?
Indoors answers structure and aroma faster. However, an outdoor test answers the question that usually matters more: does it finish in time?
Should the tester get the best spot in the garden?
It should get an ordinary spot. Therefore, the result describes what the variety does for you rather than under ideal treatment.
What if both tester seeds fail to germinate?
That says more about the sowing than the line. In practice, depth, warmth and moisture explain almost all early failures.
Can I compare notes with another grower?
Their notes help with structure and aroma. By contrast, timing and resilience depend on their climate rather than yours.
How many new lines per season is sensible?
One or two alongside known varieties. Meanwhile, a season made entirely of unknowns leaves you nothing to measure against.
Does a tester plant need a smaller pot?
It needs the pot you would normally use. In practice, shrinking the pot changes the answer you were trying to get.
Is it worth testing the same line twice in one year?
With a short-cycle variety, yes. Furthermore, two runs in one season remove most of the weather’s influence from the result.
What is the most common testing mistake?
Changing the setup at the same time. As a result, the grower ends up learning about the change rather than the seeds.
Frequently asked questions
How many seeds make a useful test?
One tells you the basics and two is better. Beyond that you are no longer testing but growing the variety properly.
Can I judge yield from a tester?
Not reliably. A single plant reflects its pot, light and position far more than its genetics.
Should I test autoflowering or photoperiod lines?
Autos answer faster because the calendar is fixed. However, photoperiod plants give you more room to correct a mistake mid-test.
Is it worth testing a variety everyone already recommends?
Often yes, as a calibration. Knowing how a famous line behaves in your space makes every later comparison more useful.
