Progress

I would say give them a flushing before you venture too deep into flowering. One re-occuring trend i see when i am looking across this website are gardens beginning to display deficiencies between week 3 and week 4 of flower. All during veg plants look great, doing well, growing nicely. They flip to flower and continue admiring their incredible gardening skills lol, then week 4 rolls around and everyone runs here calling for help because their plants start yellowing or spotting up with necrosis. Most bottled nutrients are pretty concentrated and there shouldn't ever be a deficiency. What is often the case is lockouts rather than deficiencies. Lock out occur when chemical fertilizer salts build up over time, (like through veg and a few weeks into bloom) So it's a good practice to do a flush mid way through your grow if you are using chemical nutrients. Either at the end of your veg, or around week 3 of flower. Flushing your plants soil is a preventative maintenance practice. Plants don't uptake nutrients at even ratios so nothing prevents 1 element to over take another in your soil, and if the ratio's are thrown too far off, 1 nutrient can lock out another simply because there is too much of 1 element that affects another's ability to be absorbed.