What kind of heated propagator do you have? Is it thermostatically controlled? What's the ambient temperature of the room it's in? How high above ambient is it supposed to raise the temperature? (It could be anything between 8 and 12 degrees, depending on the model.)
I ask these questions not as an expert, but as someone who has had patchy success in the past and wants to up her game this year!
Edit: I know you asked about watering, but knowing your setup might help with answers
I ask these questions not as an expert, but as someone who has had patchy success in the past and wants to up her game this year!
Edit: I know you asked about watering, but knowing your setup might help with answers
How much veg and wildlife can I pack into a 6m x 8m garden in suburban Cambridge? Let’s find out!