Onion seedlings yellowing and falling. Help!

dylcookMarch 28, 2011

First time growing onions from seeds. Planted about a month ago and had decent germination. I'm growing Redwing and Yellow of Parma. They are under fluorescent lights, 16 hrs a day, in a 70 degree room. They seemed strong until about 3 days ago when the tips started drying and yellowing. Now its about the top 1/4" and they've begun falling over. Any ideas?

Help is much appreciated.

Thank you for reporting this comment. Undo
seysonn(8a WA/HZ 1)

Lower the temperature. Once germinated, onions don't need 70F. they sould fine around 55-60. Yellowig can also mean lack on "N"itogen.

    Bookmark   March 29, 2011 at 6:18AM
Thank you for reporting this comment. Undo
dylcook

seysonn,

I've tried nitrogen with no luck. I'm applying it as a topdress fish meal. Maybe this isn't enough? Also, checked temperature again, it sits at about 67. Do you think this would be enough to dry out the and curl the seedlings? I appreciate your response.

    Bookmark   March 31, 2011 at 11:19AM
Thank you for reporting this comment. Undo
yopper(3-4)

Did you try trimming the tops off?
YOPPER

    Bookmark   April 2, 2011 at 9:57AM
Thank you for reporting this comment. Undo
soilent_green

There are many more folks on GW who are more experienced than I am regarding starting onions from seed, so I do yield to their opinions...

My observation on GW has been that people tend to way over-fertilize seedlings in general. I use plain rain water (never city tap or well water) and I do not fertilize until the seedlings have been transplanted into larger pots. Then I fertilize with a half-strength solution every third or fourth watering until the plants go into the garden. When they have adjusted in the ground then I go to the full strength fertilizing.

I do not start onions from seed every year but when I do I start them in potting mix and it never occurred to me to fertilize the seedlings. Never had any problems.

dylcook, my point is that I wonder if fertilizing the seedlings burned them? Or maybe overwatering?

Hope you find a solution. :-)
-Tom

    Bookmark   April 2, 2011 at 3:11PM
Sign Up to comment
More Discussions
why are my shallots soo small
I planted really nice sized shallots last fall. I would...
kmatcek
Potato onion's free/trade
Hello I have some small left over sets I will not be...
travis2
Do you soak your garlic before planting?
Was wonering how many do the overnight soak treatment...
obrionusa
Garlic left in ground over winter
I planted cloves last spring and they sprouted leaves...
garydg
Garlic Plants are Coming Up (Fall 2014)
I planted some garlic bulbs about 2-3 weeks ago. And...
redsun9
© 2015 Houzz Inc. Houzz® The new way to design your home™