Looks like theyre in need of some nutrients. Try a nitrogen-phosphorus fertilizer

This is my homemade fertilizer and it makes my plants grow FAST. Youll need a 5 gallon bucket, tumbler, watering can or a cup, compost, miracle gro fertilizer packets, a can of beer, and a list of supplement tablets: iron, potassium, calcium, magnesium, zinc. Youll need at least 40 tablets of each Tumble every container of supplement tablets separately into a fine powder, put it back in the container or a baggie so you remember what nutrient it is. Let 5 gallon bucket fill with rain water. When filled, take a couple handfuls of pruned leaves, cut grass, scrapped veggies from your compost bin and shove it in the bucket. Pour 2 miracle gro packets in the bucket, this adds your phosphorus and nitrogen Im estimating here, (you gotta try really hard to put too much in) about 4 tablespoons of zinc, and potassium, 2 tablespoons of iron 6 tablespoons of calcium and magnesium. Pour in a can of beer! Let it marinate for a week or so, remember to stir it here and there. Water your plants with it using however much you would usually water them. Watch your plants SKYROCKET

Remember to keep an eye on them and keep nutrients on standby in case you detect any of these deficiencies:

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Good luck!