Here's what I've learned about my heat mat:
- Germination time increases greatly! Instead of 7-14 days on spinach I found that the seeds germinated in less than 5 days. By knowing this I can adjust my seed starting schedule a little.
- The heat mat can dry plants out much faster. It makes sense doesn't it? Increased heat increased the rate of evaporation. I discovered this fact when we left home for a few days over Christmas. I left the cover off of a flat of seedlings that included kale and chard. When we returned many of the seedlings has dried out and died. To fix this covers of appropriate heights should be used to keep the moisture inside. Or just check the flats daily!
- Growing heucheras from seed is still fun! I've grown heucheras from seed before but this time I used the heat mat to get an earlier start. The seeds came from 2010 and were a mix of various types. 'Palace Purple' comes true from seed but most of the other varieties do not. That's good because I want some different unique heucheras to emerge from this crop of seedlings.
- Keeping a lid over the flats greatly increases the amount of heat retained in each flat, which means the heat mat doesn't have to work quite as hard to maintain a good temperature.
- Damping off can be an issue! This happens without the heat mat as well. Damping off is an annoying fungus that loves to destroy tiny seedlings before they have had a chance to really get going. If you can combat the fungus long enough for the seedlings to grow strong you can resist it. I've used the Safer Brand fungicidal soap in the past which has done a good job at keeping damping off at bay. Another method you might try is a mixture of baking soda (2-3 TBS), water (1 Gallon), horticultural oil (2 TBS) and liquid dish soap(1/2 tsp).
- Heat mats make seed starting more versatile! What do I mean by versatile? Before the heat mat I was doing my seed starting in a walk-in closet with central heat. Now I'm doing my seeds in the garage! By using the thermostat I bought with the heat mat I can keep the seedlings at a constant temperature even when it's in the 30's outside!
- Heat mats make gardening more fun! Pure opinion here but I think you'll agree!
Have you ever grown seedlings with a heat mat?
|You can find heat mats and thermostats at these online stores:|