This cold January weather has me thinking back on that high summer heat and the luffa plant that became the focal point of my garden, and many conversations. There are great articles out there outlining how to grow luffa (like this one by the awesome Niki Jabbour), so instead, I’ll outline my growing experiences here in zone 7a and share my biggest learns.
Before that though, what is a luffa exactly? It’s an annual climbing vine in the gourd family, Cucurbitaceae. It’s a large, fast-spreading climber with spiral tendrils that latch onto anything nearby, similar to watermelons and cucumbers (they’re in the same family). It has medium-sized yellow flowers with both male and female parts allowing for self-pollination. It has an exceptionally long growing season, requiring 5–6 months of full sun and high heat to reach maturity (and then dry out).
I started my luffa indoors in mid-March. I sold a bunch to my neighbors and kept three for myself. One died two weeks after transplanting, but thankfully the other two settled into their new homes nicely. I gave them each 2 cubic feet of growing space in a fabric raised bed with a few inches of fresh compost and another few inches of wood chips for mulch. I also set up a drip irrigation system at this point and was watering every other day until high summer, then switched to daily watering because fabric pots cannot retain water like the ground does.
My thoughts on growing luffa:
Space
When that summer heat finally arrives and the days are longer, this plant takes off. It spread over my fence into my neighbor’s yard and then climbed his maple tree until I literally had luffa dangling in the air, taunting me from his yard. It will grab onto your trees, shrubs, and other vegetables nearby. Keep an eye on the vines and don’t let them get away from you. Trellis high and use your space wisely.
Mulch and Compost
This is the golden rule for growing anything as far as I’m concerned. Luffa is a fast-growing plant, and if the soil has enough nutrients available, each plant will produce a hefty amount of large gourds. Layer compost generously at the beginning of the season and protect it with an equally large layer of mulch to prevent erosion and lock in moisture.
Harvesting
Processing luffa at the “green” stage is totally possible. A lot of guides suggest luffa can’t be harvested for the sponge unless it’s fully dried out, but that’s not true. At the green stage, seeds aren’t fully matured and cannot be saved for next season. It’s also harder to peel and process them before they’ve dried out, but that didn’t stop me from growing this incredible plant.
I had an absolute blast growing them, and two plants were more than enough for my backyard.