I've been starting plants from seed in my basement under lights for many years now. This year all of the plants are smaller than I expect them to be--with the possible exception of petunias. I keep records of when I sow the seeds from year to year, so I know that it isn't later sowing. My annual vinca were super wimpy and yellowed. I've had spider mite issues before because I sometimes overwinter plants in the basement as well, but one soapy rinse took care of that in the past. My tuberous begonias are still tiny--like only 2-3 itty bitty leaves--and I would expect them to be near blooming by now.
I wondered if perhaps my fluorescent lights are getting old. I do replace tubes from time to time, but I've gotten lazy about putting dates on them. I just went out and bought enough to replace all of them (and note in my seed-starting records when I've done it).
I'm pondering doing some serious cleaning over the summer while the area is empty. What do y'all think? Do I need to bleach things? Could it be a disease? (That seems unlikely to me--since most of the plants were affected.)
Maybe the new lights will fix everything??
Thanks for any advice!