Seedling Problem

[RenegadeGrower]

I am sure someone has seen this before, but I am a noob, so I hope someone has a few words of wisdom.

I germinated some seeds and I don't know why, but the tips of the leaves are burned. Bulb Burn? Not enough water? pH issues?

I have been watering with pH 5.5-5.8 keeping the cube moist (about 30g) and under a lamp..see below

 

[Young Macdonald]

Are you giving them nutes?If so, how much? Whats your lighting? How close is it to the plants? How hot is your heat pad getting? You might need a layer or two inbetween the rockwool and heat pad..

 

[atrumblood]

Yeah, I would say the plants are too hot. You can tell it is heat stress by the crispy leaf tips. Turn the heat pad down, or put a towl between your plants and that pad.

Other wise all those seedlings are going to do is cook.

 

[DR. RESINTHUMB]

looks like too much light 2 me...use florescent for start of veg

 

[RenegadeGrower]

Are you giving them nutes?If so, how much? Whats your lighting? How close is it to the plants? How hot is your heat pad getting? You might need a layer or two inbetween the rockwool and heat pad..

No nutes. Lighting is a cheapo 250 w gro light I got at home depot. I have a 2x4 t-5 4 bulb w/ 6500k bulbs, but it seemed like a waste to run for just seedlings. Think I should run it? I shut off the heat pad earlier as I was noticing the cubes were a bit hot the past few days. Glad to read your comments as it helps confirm my suspicions.

Yeah, I would say the plants are too hot. You can tell it is heat stress by the crispy leaf tips. Turn the heat pad down, or put a towl between your plants and that pad.

Other wise all those seedlings are going to do is cook.

Thanks for your help!

looks like too much light 2 me...use florescent for start of veg

 

[Young Macdonald]

You dont need that much lighting this early. All your gonna do is light your room and add a few bucks to the bill. I use one 30 watt cfl for each plant for the first 3 weeks or so or until the plant is atleast 5 or 6 inches tall.

 

[RenegadeGrower]

OK thanks YM, I shut off the heat matt friday and noticed some profuse root growth over Sat/Sun. This AM the bottoms of the cubes felt a bit cool, so I added back the heat matt and put a towel and plastic plate down to give a littl warmth. I will check later to see how they are doing.