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Ayote plant thrives in late-year tropical moisture due to its specific evolutionary adaptations.

Smart Water Retention Tips For Dry-Zone Gardens In Costa Rica




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Published on Saturday, August 29, 2026






By Victoria Torley




We were out walking in the rain this morning, which is not as odd as it sounds. After all, this is the rainy season.



El Niño plays havoc with weather systems. We have had 4 days straight now with some sort of rain. It has even been moderately heavy at times.



Another odd thing is that it happens at unusual times. Two in the afternoon, and we get a sudden rain that lasts for 20 minutes and disappears. It’s hard to plan a pool party when the weather is uncertain.



On the other hand, there is nothing like a nice daily rain to keep the plants happy. We have no water restrictions here, but I still feel guilty when I water the wilting plants.





So, for those of you with no rain, mostly in the Guanacaste zone, here is some advice.



Top dress all your plants. Top dressing, or surface mulching, was a lot easier in the U.S. when Lowe's was just two miles away, and you could buy by the bag. Of course, my favorite way to top dress was to go into the woods with a hatchet and bags and chop up a decayed tree trunk. That stuff was perfect. Well-rotted, chunked by the hatchet, and just ready to spread around my plants. A couple sheets of newspaper or a piece of landscaper’s fabric under it to keep the weeds down and water retention was assured.



Try Hugelkultur. This German method for water retention starts before you put in your first plant. It involves digging a hole and burying logs (my guess would be partly rotted ones), wood, and other natural debris. The hole is then backfilled and planted. The buried material holds moisture that might otherwise run off, and the decay products provide natural fertilizer. For more info, watch the " Understanding Hugelkultur, How and Why to Do It" video on YouTube.



Drip irrigation will minimize water usage, and systems can be found at any number of hardware stores. If you use a drip system or water with a hose, evening is the best time to do so.





Your biggestno-noduring drought is using stones even though you hear them suggested. Yes, water runs through stones to the plant roots, but during a drought, you are getting a lot more sun than rain, and stones hold heat. Use stones, and you are actually cooking those poor plant roots. No-no. Pull them out and try something else.



Shredded newspaper around your plants may look sad, but it protects the roots from sun and wind, and water goes through it to the plant
. If you want it to be more attractive, cover it with macadamia shells. Oh, and try to get the shells at a macadamia farm where they are c2,000 for a giant coffee sack full. If you see them in a gallon bag for c4,000, run.



Plant of the week
. Ayote (Cucurbita moschata) thrives in late-year tropical moisture due to its specific evolutionary adaptations. This native Costa Rican squash possesses biological traits that prevent rot, resist pests, and leverage heavy rainfall for rapid growth.







Thick, hairy stems and leaves shed water quickly. This reduces the risk of powdery mildew and downy mildew. The aggressive, sprawling root system absorbs oxygen efficiently, even in waterlogged or compacted clay soils.



The
rind develops a heavy, natural wax coating. This barrier prevents water infiltration and fruit rot on wet ground. The vine roots at multiple nodes as it travels. If the main root suffers from moisture stress, secondary roots sustain the plant.



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Find more interesting stories about gardening in Costa Rica on the AM Costa Rica Garden Magazine. Questions on this article, Ms. Torley, gardener columnist, can be reached by emailing victoriatorley1@gmail.com
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