Post by Pharmer Phil on Feb 3, 2008 16:32:03 GMT -6
bottom heat is important for heat loving plants, peppers, tomatoes, etc. We use a old electric blanket, works fine. the bottom temps encourage better root development.
that being said, .... Peppers,
If the ground temperatures at the time you set your plants in the ground, is cooler than 50..OR, significantly cooler than what they were on a heat pad of any type...they will go into a bit of shock... the plant will grow, but growth is slowed for a bit. always taper the temps off if there will be a slight temperature difference.
The waterbed heater, works great, I had to laugh, cause when I was younger, the daily ritual was setting all the plant trays OFF the waterbed B4 bedtime, and back on in the morning.... A king sized waterbed will heat the bottoms of many trays
Post by jacobtowne on Feb 12, 2008 10:22:00 GMT -6
Bottom heat works well when the air temperature is lower than desired for rapid and even germination. I’ve listed below some optimum temperatures for crops commonly started in pots and flats. The info. comes from Johnny’s catalogue.
Please note that the temps. are ideal, and that some seed will germinate over a range of temps., some broad, others narrow.
For example, I sowed scallion and leek Feb. 1st, placing the pots on the kitchen range top where the pilot lights add a bit of bottom heat, and raise the air temp. slightly. The range was 68 degrees at night, to about 72 days. The scallions sprouted in five days, the leeks in six, although new leek sprouts appeared over the following week. I suspect that these crops would germinate well at normal room temps.
Where it’s critical is with heat-loving plants, as already mentioned, and lettuce sown in flats during the heat of summer, when I set lettuce flats on the concrete floor of the cellar, where the temp. is in the low 60s.
ARTICHOKE Artichoke 1 (from catalogue). 70-80 Aritichoke 2 (from seed packet). 80-85 for eight hours a day and 68-75 for 16 hours a day as seeds germinate best under alternating temp. cycles.
Heaters and waterbeds work very well. We started some of the Spring seeds already. We use seed starting mix, plant the seeds and then put the freshly planted seed trays under the pedastal of the waterbed till they sprout. Since we have 4 drawers under it, each drawer gets a tray. It takes only a few days and the results are great.
You just can't forget about hhem....lol Good Luck,
Like stated if you are starting in lower than desired temperatures then some bottom heat helps. I start my peppers in the bathroom which I keep close to 80 and the tomatoes in the bedroom usually with great results. I only use heat when using a room lower than the temps. I dersire. And once they are moved to the light stand in the utility room they don't get any heat. Then they go out hopefully this year in a greenhouse then to the garden. Bottom heat is nice but not a necessity for me. Look at all the plants started in greenhouses that don't have bottom heat. JMO