Plant care cards are great for quick reference, but you’ve probably seen some that say “water every 7 days” or “water every 14 days.” While that’s a helpful starting point, it doesn't tell the whole story.
A plant’s needs depend on much more than a number on a calendar. Factors like the current season, the humidity in your home, the size of the pot, and how close your plant is to an AC vent all play a role.
Pro-Tip: Watch out for your Alocasias! These plants do not like direct air conditioning—they are notorious for throwing their leaves on the floor if they get too cold.
The "Dryness" Rule of Thumb
While different plants have different needs, it’s better to think about watering based on how much the soil needs to dry out. Use this as your guide:
- Let dry out completely: For succulents and cacti.
- Let dry out halfway: For most tropicals.
- Keep consistently moist: For ferns and other moisture-lovers.
How to Tell When Your Plant is Thirsty
The best way to tell if your plant needs water is to check the soil, not the calendar.
- The Finger or Chopstick Method: If you don't mind getting a little soil on your hands, stick your finger an inch or two into the soil. If it’s dry, it’s time to water! Prefer to keep your hands clean? Use a wooden chopstick. If it comes out clean—much like checking a cake with a toothpick—it’s time to water. If soil sticks to it, your plant still has plenty of moisture.
- The Weight Test: Pick up the pot. A dry plant feels significantly lighter than a freshly watered one. This is my favorite method for hanging plants like Pothos, where the soil is hard to reach. If the pot feels "hefty," I let it go a few more days.
- Listen to the Plant: Many plants have distinct "tells." The Nerve Plant is famous for "fainting" when it’s thirsty. Succulents will often wrinkle or soften their leaves. String of Pearls will shrivel and String of Turtles will fold easily when they need a drink. Waiting for these cues is actually the best way to avoid overwatering succulents!
The "Soak and Drain" Method
Drainage is non-negotiable for indoor plants. Unlike outdoor plants—which have airflow to help pull water out of the soil—indoor plants need a little help.
I always recommend the Soak and Drain method:
- Thoroughly soak the soil to ensure every root gets hydrated.
- Let the plant fully drain. Never let your plant sit in a saucer of standing water; it’s a one-way ticket to root rot.
- Check your cover pots. I’ve learned this the hard way! If you use a decorative cover pot, always take the nursery pot out to water, drain it completely, and then put it back. If you skip this, your plant might end up sitting in water hidden at the bottom of its cover pot.
The #1 Indoor Plant Killer: Overwatering
If you’re ever unsure, err on the side of being a little too dry. It is much easier to fix a thirsty plant than a rotted one.
Signs of Overwatering:
- Yellowing leaves
- Soft or mushy stems/roots
- Soggy, waterlogged soil
- The appearance of fungus gnats
If your plant is showing these signs, check for standing water immediately. Depending on the damage, your plant may need a fresh repot with new soil to save it. If the pot was too big, moving it into a smaller container will also help prevent future rot.
Final Thoughts
Learning takes time, and mistakes happen. If a plant ends up being unsalvageable, don't be discouraged. As long as you learned something from the experience, you’ve gained something. Don’t be afraid to try again!