How to Water Houseplants in Summer: 8 Essential Rules

Why Summer Watering Is Different from Winter

In Tashkent summer temperatures easily climb above 40 °C. Air conditioners dry out the air while plants transpire moisture through their leaves at full speed. The watering routine that worked in winter will either parch your plants or drown their roots in summer.

Here are eight rules that will keep your plants healthy through the hottest months.

Rule 1: Check the Soil, Not the Calendar

Forget a fixed schedule like "water every Tuesday." The only reliable method is to test the soil with your finger. Push it 2-3 cm deep:

• Dry — time to water
• Damp — wait another day or two
• Wet — do not water under any circumstances

For a ZZ plant or sansevieria the soil should dry out completely. For a peace lily or calathea only the top layer needs to dry.

Rule 2: Water in the Morning

The best time to water is early morning, before 9-10 a.m. The plant absorbs moisture before the midday heat evaporates it from the surface. Evening watering is acceptable, but excess water sitting overnight can encourage fungal growth.

Never water in the middle of the day — cold water will shock the roots when soil temperatures are high.

Rule 3: Use the Right Water

Ideal water for houseplants:

• Settled — leave tap water to stand for 24 hours so the chlorine evaporates
• Room temperature — not from the fridge, not hot
• Soft — if Tashkent tap water is hard, use filtered water

Boiled water is a poor choice. It loses dissolved oxygen that roots need.

Rule 4: Water Deeply but Infrequently

One generous soak is better than three timid splashes. Shallow watering never reaches the lower roots and the plant suffers. Water until it flows out of the drainage holes. After 20 minutes, empty the saucer.

Rule 5: Don't Forget the Drainage

Heavy summer watering without good drainage is a shortcut to root rot. Make sure that:

• The pot has drainage holes
• There is a 2-3 cm layer of expanded clay at the bottom
• The soil is loose and not compacted

If you used the right soil mix when repotting (more details in our Spring Repotting Guide), drainage should not be a problem.

Rule 6: Mist Your Tropical Plants

Calathea, alocasia and peace lily hail from the tropics where humidity runs at 70-80 %. Tashkent's dry summer air is stressful for them. Mist the leaves with a fine sprayer morning and evening.

Do not mist: sansevieria, ZZ plant and succulents — they do not appreciate it.

Rule 7: Recognise the Signs of Over- and Underwatering

Signs of overwatering:

• Yellowing lower leaves
• Soft, mushy stem at the base
• Unpleasant smell from the soil
• Fungus gnats hovering over the pot

Signs of underwatering:

• Dry, brown leaf tips
• Wilting, droopy leaves
• Soil pulling away from the pot walls
• Curling leaves

Rule 8: Going on Holiday? Prepare in Advance

Two weeks without water in summer is a serious test. Here is what helps:

• Wick watering — dip one end of a cotton cord into a jar of water and bury the other end in the soil
• Drip watering — turn a bottle with a tiny hole in its cap upside-down into the pot
• Relocate plants away from windows to a cooler spot
• Ask a neighbour — but leave clear instructions so they don't overwater

Need advice on caring for a specific plant? Browse our catalogue — each listing includes a care card with watering and lighting recommendations.