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Down the Garden Path: Are your Houseplants Ready for Summer Vacation?

You sorted them last fall, deciding which ones win the windowsill lottery and which ones go on to “a better place” – a.k.a., the compost pile. Those that made it indoors found warmth and sunlight. Those that hit the compost pile enter the world of dark, wet and cold to come back as organic matter to other plants in the yard.

If you’re reviving them by putting them back outside on the patio or under the trees in a shady bed, now is the time to do some repotting, pruning and cleaning so the better conditions outdoors allow for good recovery and growth before next fall.

Repotting allows you to cut away any dead roots and replace the spent potting soil with a new mix full of nutrients. If you can repot using the same soil mix for all your houseplants, watering will be easier, at least from the soil mix perspective. Any new mix typically will drain away excess moisture better than the old soil mix that has broken down and contains dead roots.

If you have the room to encourage bigger plants, go up one pot size, but no more. Roots need to be able to fill the pot by summer’s end. If you are at the maximum plant size now, clearing out the old dead or damaged roots allows for repotting back into the same pot with new soil mix.

Pruning consists of taking back any growth that occurred indoors over the winter. Very likely, it is thin and spindly, having grown toward the light of the window. This kind of pruning also helps balance the remaining top of the plant with the remaining roots in the pot. For foliage, another expectation should be some leaf loss and perhaps some sunburn if put directly into full sun immediately. Leaves created in the winter indoors do not have any “sunblock” on yet. Best to set any houseplant out on a cloudy day if possible.

While you are cleaning, you get a chance to look at the overall condition of the foliage. Maybe the plants have great foliage making your job easier.

If you have cats, then they enjoy a little taste testing and you will find holes and torn tissue. Some older, lower leaves facing away from window may have naturally died, pushing food into parts of the plant that can benefit from the sunlight, so that makes removing those leaves an easy choice. If you were lucky enough to have flowers in the winter from succulents, time to cut away the flower stalk.

Lastly, no fertilizer at first. Water and sunlight will be all that is needed to get those houseplants back on the survival road. Once you see new leaves emerge and mature, fertilize with the product of choice. Feed them until July 4, then let them coast and slow down for that inevitable trip back inside the house after their summer vacation.

• Richard Hentschel is a Horticulture Extension Educator with University of Illinois Extension, serving DuPage, Kane and Kendall counties. Stay tuned to more garden and yard updates with This Week in the Garden videos at facebook.com/extensiondkk/videos and the Green Side Up podcast at go.illinois.edu/greensideup. The 2019 Kendall County Master Gardener Help Desk is open from 9 a.m. to 12:30 p.m. Monday through Friday at 630-553-5823.

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