Why arent the Salvia annuals growing larger?
I bought a market pack of these red flowered Salvia at a nursery store about 5 weeks ago. I dont remember the variety name, but I believe it was Red-Hot. It was definitely Red- something. They have a large flower spike that stands vertical above each plant with multiple red flowers jutting horizontally outward from the spike.
I also bought a few Vinca annual market packs, but mostly Portulaca plants(annuals). All of these plants were bought at the same time and planted the same day on May 5th, just 36 days ago. The Portulaca plants are now 3-5X the size they were when planted and the Vinca are maybe 2X larger.
But the Salvias arent growing at all, and their original flower spikes are almost gone, with very little evidence of new spikes starting out. They get roughly 5-7 hours of direct sun and the soil has been fairly moist, and the temperature has been between high 50's to mid 80's, and the low temps between high 40's to high 60's.
Why arent they growing yet, why no new flower spikes?