I don’t know what I did wrong this summer
I would appreciate any advice. I am feeling so dejected and like all of my research has been for nothing. This was my first time ever growing plants from seedlings and it all was going so well until July! I grew every single one from seed starting in April. I feel like a bad mother now as the only thing that is doing okay are my green onions for some reason🥺
1st pic from top to bottom:
Cosmos - first bloom May 20 and continued until maybe mid June
Zinnias - first bloom June 23, but got hit hard with powdery mildew. I had maybe 5-6 blooms since then with one more starting this week.
I sprayed twice over the last three months with a spray to help stop it.
Statice - only started blooming a few weeks ago, have had a lot of problems with overwatering and getting yellow leaves. It took me a long time to figure out how much to water.
Asters & Odamaki in the long planter (also 2nd picture close up) - are completely fried now. I had huge problems with ダチソウグンバイ chrysanthemum lace bugs in the pot and then later spider mites on the asters. I used a spray from DCM that said it works on both twice over 2 months.
Location: Southern Aichi in Mikawa area
Fertilizer: About one month ago I used some fertilizer pellets from Daiso in each pot but used a little less than the recommended 24g as last year I over fertilized.
Water: I’m watering every 3-4 days now as the soil doesn’t completely dry until then. I’m using tap water as I don’t have filtered.
Soil: The soil is for flowers/vegetables from DCM and I mixed some sphagnum moss in about 2 months ago to try to keep the soil moist longer but I don’t think it helped.
3rd picture shows the bottom of one of the pots. They all have this white buildup(?) on the bottoms and I’m not sure what it is.
Edit: forgot to add location