Seedlings from starting kit tray/dome/heat pad
Stephane (Texas-8a)
8 years ago
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halocline
8 years agoaddicted2plants Southern IL USA
8 years agoRelated Discussions
Seedling heat pad importance / favored source
Comments (6)The heat mat is a necessity, as far as I'm concerned. I was too cheap to buy one last year and my seeds grew, but a LOT slower than the seeds that I'd germinated at the arboretum's greenhouse (they have bottom heat, but they use piped hot water). The difference was even noticeable at two weeks. I believe -and I might be totally wrong on this - but I believe that bottom heat might also thwart some of the fungus that causes damping off, too. The temperature at which spores germinate is around 68 degrees F. Much warmer or much colder and it can be a problem for fungal growth. (Others say that temps in the 50s (F) is optimal for fungus, too). When the soil temp is 78 I'm guessing this might have some sort of slowing-effect on the organisms that cause damping off. Of course, the surefire way to prevent damping off is simply by letting the soil surface dry out between waterings, but I DO know that of the seeds I'm growing right now, I've only lost two seedlings on the tray growing on top of bottom heat, where as I've lost about ten or twelve on the tray I'm not using bottom heat on. As far as selection goes, I'd suggest this one: This is the one I've used and I've NEVER used a thermostat with it. IT doesn't get TOO hot, where as some other heat mats will getup to 95 F without a regulating thermostat. I just got another heat mat and grow-dome/flat to do another round of metasequoias at my old man's house and the sketchy pot-grower store that I went to to by it tried to sell me a thermostat, as well. Guess how much that thing cost? 70 bucks! Everything else at this joint was already over-priced anyway so I said "to hell with it". If, for some reason, you can't find the hydrofarm heat mat and you feel that your heat mat is getting too hot, you can just place a towel over it (remember, 95 F is only a few degrees lower than the temperature of the human body so you're not going to start a fire) to reduce the amount of heat that reaches your propagation tray and cool it down a little bit. You can also take a temp reading with a cooking/turkey thermometer if you want to know for sure what the temp is, but just use that hydro farm heat mat if it's available, that thing will give you no trouble. Good Luck....See MoreSeedling Heating Pad Questions
Comments (4)Ruthann, I have tried it both ways. Trying to root cuttings, I put the pots on a low, cake cooling rack about 3/4" over the heating pad. The cuttings seemed to progress very slowly, if at all. I then put the pots directly on the pad and the cuttings rooted pretty quickly. With seedlings, it seemed to be too hot directly on the pad and the soil dried out very quickly. I bought some metal screening with about 1/2" squares and folded it in two and placed that on the pad. This raised the pots about 1/4 to 1/2" over the pad. The pots still got warmed and the soil stayed slightly moist longer. The dome suggestion is a good one. It will also prevent the soil from drying too quickly. I built a tent over the seedlings using some stakes and transparent plastic tarp. I had them in a growhouse so I didn't have to worry about wind knocking it on top of the seedlings and rooting seeds. Mike...See MoreHeat pad and heat mat
Comments (5)"...Is this true?" My guess is that is an attempt by the maker to avoid liability. Seriously, if a horticultural heating mat can't be left unattended - it's useless! I doubt you'd have problems, but you gotta wonder about how much trust you an put into a product which you can't leave unattended. Keep in mind though, that you should be extra careful, whether attended or unattended, using any electrical device around water. In the past I've used heating pads made for sore muscles. I would recommend that before you sow, you put a thermometer in the soil to make sure the soil temp isn't too hot. If it's above what you want (depending on factors such as what seeds you are sowing) place something to provide a layer of insulation. You can usually even use a couple of pencils to lift it up off of direct contact with the pad or metal pan you described. If try a few things, you'll find something that works well. Again, make sure it's safe....See MoreStarting seeds....soil, light and heat mat?
Comments (2)First, you might want to read through all the Seed starting FAQs here. They cover all the basics and then some. Second, the search will pull up previous discussions on most any topic that is part of the process. Things like 'using a dome', 'how close should the light be', 'what light works best', 'best soil mix', 'do you have to use grow light', and even more complex issues like 'using seedling trays', 'mixing different varieties in the same tray', etc. Tons of info already available here. As for mix, most any good soil-less potting mix will work fine and many brands are available. Personally I avoid the so-called "organic" mixes because they cost more, don't work any better, and can harm young seedlings. Don't mix different varieties that have different germination times in the same tray. Some will rot and die before many of the others even sprout. How close the light all depends on the type and size of light. Not all are equal by any means. Domes are a crutch and must be used with care if used at all. Dave Seed Starting FAQs...See Morehalocline
8 years agorcharles_gw (Canada)
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8 years agoBob Davis
8 years agoStephane (Texas-8a)
8 years agoStephane (Texas-8a)
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8 years agoStephane (Texas-8a)
8 years agolast modified: 8 years agoStephane (Texas-8a)
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8 years agolast modified: 8 years agoDain (Zone 5a, high NM Desert)
8 years agoStephane (Texas-8a)
8 years agorcharles_gw (Canada)
8 years agoStephane (Texas-8a)
8 years agoStephane (Texas-8a)
8 years agolast modified: 8 years agohalocline
8 years agoDain (Zone 5a, high NM Desert)
8 years agoStephane (Texas-8a)
8 years agoStephane (Texas-8a)
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7 years agoStephane (Texas-8a)
7 years agoStephane (Texas-8a)
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7 years agogreenclaws UK, Zone 8a
7 years agoStephane (Texas-8a)
7 years agolast modified: 7 years agoConnyNL (The Netherlands, 8b)
7 years agoStephane (Texas-8a)
7 years agoAgartta
7 years agoSara Sidwell
6 years agoStephane (Texas-8a)
6 years agolast modified: 6 years agohalocline
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6 years ago
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