Seedling heat mats

karen_b(6a s.c. PA)February 21, 2005

I am new to starting seeds indoors using a seedling heat mat, I bought the heat mat and the automatic thermastat. I have the setup in the basement which is around 55-60 degrees. The thermastat states that if the heat mat stays on for more than 5 hours at a time to add something under the mat to hold in the heat. Any suggestions?

The setup: Sunlight table growlight, 4' L heat mat on top of the growlight base (the base is partially filled in with ceramic tile because the mat is larger than the base and doesn't fit inside the base). I put a cardboard box over the trays (because the seeds need the dark to germinate).

Thanks

Karen_B

Thank you for reporting this comment. Undo
shrubs_n_bulbs(z8/9 UK)

Bubble wrap, expanded polystyrene sheets, corrugated cardboard, even a blanket or a folded bedsheet.

    Bookmark   February 22, 2005 at 8:39AM
Thank you for reporting this comment. Undo
wyndyacre(z6B SW Ont.)

I have flats of cuttings that I'm rooting and also some flats of seeds on heat mats in my unheated greenhouse. The temp of the GH is in the 80's on a sunny day but dips down pretty low at night. I've placed the mats on a sheet of rigid styrofoam, the flats with clear dome lids on top and at night I go out and cover the flats with several layors of burlap (a blanket would do just as well)which I remove during the day. A few cloudy, cold days I haven't bothered to remove the burlap. I should add that my heat mats came with a thin plastic tray that they sit in as well, so they do not sit directly on the styrofoam.

    Bookmark   February 23, 2005 at 6:36PM
Thank you for reporting this comment. Undo
karen_b(6a s.c. PA)

Thanks for your ideas, the flats are supposed to be kept in the dark so I covered them with cardboard boxes and now the light on the thermostat has gone out. Apparently it didn't need much. Thanks, I will remember all of your ideas.
Karen_B

    Bookmark   February 24, 2005 at 10:16AM
Thank you for reporting this comment. Undo
george102(z6-7 VA)

I have a problem with TOO MUCH heat from a mat. I have three altogether, two of them some years old. This morning I discovered that one of the older ones had gone wild and heated a flat planted with lobelia, candytuft and carnation seeds to 100 degrees Fahrenheit.

Of course, I've moved the flat to another mat. My question: have the seeds been cooked beyond germination? They've been on the bad tray for 48 hours.

    Bookmark   February 24, 2005 at 12:32PM
Sign Up to comment
More Discussions
Bell peppers
My flowers fall off before fruit developes. Any suggestions?...
AliMatt
Seed Starting Lights at night?
In my area (Nova Scotia) I have time of day metering...
youngdb
Correcting Lighting Later?
Hello, I am germinating Palmer amaranth for an experiment...
Tigger033
Dwarf Papaya growing and blooming under grow lights
Here are a couple pics of dwarf papaya plants that...
arctictropical
Energy efficient grow lighting
We are probably going to buying a nice heavy duty heated...
oldbat2be
© 2015 Houzz Inc. Houzz® The new way to design your home™