Heated vs. Unheated Propagator - Which is Best?
Which is better at germinating seeds - a heated or unheated propagator?
We put 'em to the test! And here's what we found out.
What we Did
We bought 6 types of herb seeds:
- Holy basil
- Purple basil
None had been crushed or cracked in transit - all seemed viable, so we got to work.
As cubes were removed, excess moisture was squeezed out.
This made sure the rooting environment wasn't too moist.
Seeds were gently placed in the cubes. Where possible, they were covered with loose bits of rockwool
We labelled trays as we went, so we know which plants came from which seeds.
By the time we were done, we had two identical seed trays.
The propagators went into the same tent, each under their own T5 light.
Vents were left closed, to keep the humidity high.
We started seeing differences just 5 days in.
Already, small cracks were starting to form on seeds in the heated propagtor. There were still no signs of life in the unheated propagator.
Heated propagator - day 2
Unheated propagator - day 2
There's been quite a bit of action in both propagators.
Far more seeds had sprouted in the heated propagator. And they were bigger - the purple basil especially!
It's worth noting that the heated propagator needed spraying with water at this point because the cubes had started to dry a little. This is something you need to keep an eye on if you use a heated propagator.
Heated propagator - day 5
Unheated propagator - day 5
By now, all seed varieties have sprouted in the heated propagator. They look pretty big, too.
In the unheated propagator, the holy basil seeds are yet to germinate.
Heated propagator - day 7
Unheated propagator - day 7
By now, the seeds in the heated propagator are steaming ahead! They're much more advanced. More parsley seeds have germinanted in the unheated propagator but still no holy basil.
Heated propagator - day 9
Unheated propagator - day 9