Green Thumb Tip #21: The Mid-Summer Snack


A snack makes us all feel a little better, doesn’t it?  If you want the plants you tend to have that ‘Wow!’ factor as summer relentlessly wears on, give them a tasty pick-me-up.  There are several good choices, and it’s easy enough to add care and feeding into your routine.



Although plants ‘make their own food’ from sunlight, carbon dioxide and water on a daily basis, they also need an assortment of other elements and minerals for optimal growth.  Plants rooted in the Earth likely find most of what they need dissolved in the soil.  When we grow a plant in a pot or basket, anchored in potting mix, we need to provide those important minerals and extra elements to support their growth.



Nitrogen is the most important element to support lush growth.  Phosphorous and potassium (K) support blooming, fruit formation, and healthy tissue development.  You’ll find the percentage of these elements listed on any fertilizer you might buy, in the formulation of N-P-K.  A fertilizer labeled 10-10-10 is a balanced fertilizer.   Since only 30% of the product is labeled as one of the key elements, you know that 70% of the product is filler, which may contain other necessary elements and minerals.


Still waiting for the first blooms to appear on this new Begonia….


But your plants might need a ‘pick me up’ that has more of one element than another.  You will find lots of specialty organic and inorganic fertilizers formulated for different uses.  Savvy gardeners would never  apply a standard lawn fertilizer to a flowering potted plant, for example.  Read the labels on the products at your favorite nursery or big box store to find the right product for the right plant.

When you potted up your plants in the spring, you likely added a little Espoma Plant Tone or Osmocote to the mix.  Or maybe you used a potting soil advertised to have fertilizer already mixed into it.  That is fine, but most of the pre-mixed potting soils feed for roughly 90 days.  That means that they’re beginning to lose the umph right as we hit the heat and dry spells that summer always brings.



Many products are water soluble and can be mixed into a watering can and applied as a soil drench or foliar feed.  These give the quickest ‘pick me up’ results.  I learned about Neptune’s Harvest from a trusted nurseryman many years ago, and have used it ever since.  This is my ‘go to’ product for most pots and baskets out of doors, and I use it at least a couple of times a month in June through September.

The numbers on this fertilizer are relatively low (2-3-1), in part because it is an organic fertilizer made from seaweed and fish emulsion.  Yes, it smells terrible.  But because it is made from these organic materials, Neptune’s Harvest also delivers many trace minerals for stronger, healthier growth.

Plants can access the nutrition very quickly and show results very quickly.  Plants show better leaf color, put on stronger new growth and set more blooms after a dilute application of this mix.



For plants indoors, and those plants I’m growing mainly for their flowers, I prefer to use Orchid Plus plant food (20-14-13) from time to time.  This is a reliable way to induce the plants to set buds and produce flowers.

This is one of those ‘light blue’ chemical fertilizers, and I mix it up much weaker than the package suggests.  If you feed too frequently, a mineral residue will build up on the pot, or even the potting soil.  Use this when watering only about once every two to three weeks.



Plants are under a lot of stress in our area right now.  Rain has been scarce in our neighborhood, and temperatures regularly reach well above normal.  The garden looks a little tired and wilted.  The first line of defense is hydration.



Plants are mostly water, and water pumps through their tissue from the roots, up through every cell until water is released as vapor through the leaves.  When a plant wilts, it means that its cells are collapsing for lack of enough water.  Some plants can perk back up once water is available  again; others won’t.

Water helps in the short term, and in this sort of weather, small pots or baskets may need hydration every morning and evening.



Without sufficient water, their colors look dull, leaf edges may burn, and growth slows down.  New leaves and flowers may be small.  It’s not a very pretty sight!  If you have time to do nothing else, at minimum keep plants as hydrated as you can until it rains again.

Too much water causes its own set of problems, including root rot.  As in all things, we seek balance. 

Keep in mind that when there is a lot of rain and frequent watering, soluble fertilizers will wash right out of the soil.  This is another reason to give light supplemental fertilizers on a fairly regular basis, while plants are responding to summer’s bright light and warmth with active growth.



You may have noticed that each day grows a little shorter, now that we’re nearly to August.  We’ve enjoyed a few cool nights, and the garden is preparing for its late summer show.

It’s a challenge to help our plants survive right through the season and have enough strength for a beautiful late summer and autumn display.  We have to keep them actively growing despite the challenges our weather may present.

Regular care and careful observation  are the secrets to success.  Hydration, feeding, deadheading and a little grooming ensure that our gardening investments pay generous dividends in beauty.

Woodland Gnome 2018
Green Thumb Tip # 14: Right Place Right Plant
Green Thumb Tip # 15: Conquer the Weeds!
Green Thumb Tip #16: Diversify!
Green Thumb Tip #17: Give Them Time
Green Thumb Tip # 18: Edit!  
Green Thumb Tip #19: Focus on Foliage  
Green Thumb Tip #20: Go With The Flow







About woodlandgnome

Lifelong teacher and gardener.

5 responses to “Green Thumb Tip #21: The Mid-Summer Snack

  1. You have the best begonias I’ve ever seen, so healthy. I love the combo of the white caladium and the pink cascading begonia. You’ve got a great eye!

  2. Palms are notorious for expressing symptoms of nutrient deficiency if lacking certain micronutrients. It is typically not serious, but can be rather disconcerting if a new queen palms yellows for lack of something minor that one never heard of.

    • The micronutrients are really key to lush, healthy growth, great color and vigor. Since we aren’t all botanists, it’s smart to build up the soil so that plants have whatever they might need, available. When a plant yellows the first thing that might come to mind is to feed it N, yet it could also need Fe, Mg, or so many other micronutrients that are lacking. This isn’t so much of an issue when growing native plants, of course. But when we’re trying to culture something from far away, it gets tricky. You have inspired me to offer a ‘snack’ to my mother’s potted palm when I visit tomorrow!

      • Magnesium and manganese are the two that are commonly deficient for the overly popular queen palms here. That is why fertilizer that is formulated for palms is so useful. I do not often like special formulas.

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