Ok I have come across something interesting to me but some on here may be able to give me some other insight. OK I am growing 2 varieties. Brandy wine suddath and Hallidays ML, All the ML were started in 48 cell trays (5 trays). BW grown in 3 48 cell trays and 2 72 cell trays. Both 72 cell trays 90% is at the transplant stage. Where all of the 48cell trays maybe 20%. Germination was better also in the 72 cell trays 100% where about 70-80% in the 48 cell trays, All seeds were sown at same time and germination started about the same time. I let them all dry out before watering and started using a very dilute liquid fertilizer that I made. 30ppm N, 10ppm P ppm 50ppm
Ca with less than 1 ppm Mg& Fe I used no K yet, And I only watered once with this. Anyways My only conclusion is that the 72 trays dry out quicker and had a very positive results. I was hesitant about using the 72 cell trays mainly because more plant density and less soil to root in. But I would have to say that I am probably going to ditch the 48 cell trays in the future and use just 72 cell ones. Anyone else have some input maybe another factor that I missed, Soil I made myself with like 4 parts peat, 1 part perlite and 1 part vermiculite, and the same soil was used In all trays. I am growing in a Greenhouse and daytime temps have been in the 70-80 range and knighting 45-60 range